Home Crystal structure of (2,7-dihexyl-9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane), C51H56OP2
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Crystal structure of (2,7-dihexyl-9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane), C51H56OP2

  • Nonjabulo Nyalungu , Saba Alapour ORCID logo , Holger B. Friedrich EMAIL logo and Muhammad D. Bala
Published/Copyright: December 20, 2019
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Zeitschrift für Kristallographie - New Crystal Structures
From the journal Zeitschrift für Kristallographie - New Crystal Structures Volume 235 Issue 2

Abstract

C51H56OP2, monoclinic, C2/c (no. 15), a = 20.1788(4) Å, b = 13.0247(4) Å, c = 18.0172(5) Å, β = 119.874(2)°, V = 4106.1(2) Å3, Z = 4, Rgt(F) = 0.0363, wRref(F2) = 0.0981, T = 173(2) K.

CCDC no.: 1951463

The molecular structure is shown in the figure. Table 1 contains crystallographic data and Table 2 contains the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal:Yellow block
Size:0.39 × 0.25 × 0.17 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:0.14 mm−1
Diffractometer, scan mode:Bruker SMART APEX-II, φ and ω
θmax, completeness:28.4°, >99%
N(hkl)measured, N(hkl)unique, Rint:31002, 4945, 0.038
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 4184
N(param)refined:247
Programs:Bruker [1], SHELX [2], WinGX/ORTEP [3]
Table 2:

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

AtomxyzUiso*/Ueq
P10.07415(2)−0.02859(2)0.20113(2)0.01293(9)
O10.0000000.11792(9)0.2500000.0144(2)
C10.14775(7)−0.02316(9)0.31482(8)0.0143(2)
C20.20754(8)0.04811(10)0.34784(8)0.0172(3)
H20.2101340.0981720.3110250.021*
C30.26319(8)0.04651(10)0.43391(8)0.0199(3)
H30.3037500.0949890.4555970.024*
C40.25943(8)−0.02611(11)0.48821(8)0.0210(3)
H40.297324−0.0271190.5471020.025*
C50.20051(8)−0.09693(11)0.45653(9)0.0228(3)
H50.198182−0.1467610.4936620.027*
C60.14458(8)−0.09535(10)0.37027(8)0.0189(3)
H60.103986−0.1437550.3490290.023*
C70.12841(7)−0.07824(9)0.15180(8)0.0137(2)
C80.20525(7)−0.10703(10)0.19706(8)0.0169(3)
H80.234366−0.0949310.2569380.020*
C90.23954(8)−0.15352(10)0.15477(9)0.0197(3)
H90.291538−0.1742000.1862730.024*
C100.19825(8)−0.16965(10)0.06731(9)0.0210(3)
H100.222115−0.2002840.0387550.025*
C110.12191(8)−0.14102(11)0.02132(9)0.0227(3)
H110.093562−0.151259−0.0388540.027*
C120.08712(8)−0.09733(10)0.06364(8)0.0187(3)
H120.034402−0.0801150.0322120.022*
C130.06851(7)0.10943(9)0.17670(7)0.0125(2)
C140.03279(7)0.17168(9)0.21044(7)0.0124(2)
C150.03150(7)0.27749(9)0.20529(7)0.0125(2)
C160.06258(7)0.32205(10)0.15837(7)0.0141(2)
H160.0612640.3946280.1525970.017*
C170.09513(7)0.26415(10)0.12011(7)0.0137(2)
C180.09870(7)0.15756(10)0.13103(7)0.0136(2)
H180.1222540.1170800.1067420.016*
C190.12675(7)0.31459(10)0.06852(8)0.0156(2)
H19A0.1779790.2858390.0865300.019*
H19B0.1328620.3890530.0812210.019*
C200.07554(7)0.29937(10)−0.02841(8)0.0167(3)
H20A0.1024080.326397−0.0576550.020*
H20B0.0674090.224904−0.0406430.020*
C21−0.00208(7)0.35201(10)−0.06542(8)0.0175(3)
H21A−0.0291240.325222−0.0362950.021*
H21B0.0057990.426607−0.0537680.021*
C22−0.05184(7)0.33523(10)−0.16158(8)0.0176(3)
H22A−0.0282410.370977−0.1911500.021*
H22B−0.0530470.260956−0.1738660.021*
C23−0.13352(8)0.37351(11)−0.19782(9)0.0213(3)
H23A−0.1565660.340123−0.1666820.026*
H23B−0.1326510.448454−0.1881950.026*
C24−0.18303(8)0.35160(12)−0.29307(9)0.0270(3)
H24A−0.1582880.379460−0.3237180.040*
H24B−0.2331490.383967−0.3145550.040*
H24C−0.1895300.277266−0.3022730.040*
C250.0000000.34456(13)0.2500000.0136(3)
C260.06485(8)0.41270(10)0.31693(8)0.0194(3)
H26A0.1050100.3691190.3604210.029*
H26B0.0444550.4579190.3442520.029*
H26C0.0862520.4543220.2886070.029*

Source of material

A solution of 2,7-di-n-hexyl-9,9-dimethylxanthene (1 g, 2.6 mmol), and tetramethylethylenediamine (1.0 mL, 6.7 mmol) in dry degassed Et2O (30 mL) was cooled to 0 °C. To the chilled solution, n-BuLi (4.2 mL, 6.7 mmol) was added dropwise. The reaction mixture was allowed to warm to room temperature and left to stir for 16 hours. The resulting dark red mixture was cooled to 0 °C and PPh2Cl (1.3 mL, 6.8 mmol) in dry hexane (4 mL) added dropwise. The reaction mixture slowly decolourised and a fine precipitate formed. The reaction was allowed to stir for further 16 hours. The reaction was slowly hydrolysed with a 25 mL 10% HCl/brine mixture (1/1). The organic layer was removed, and the aqueous layer extracted with DCM. Combined fractions were dried over anhydrous MgSO4, filtered, and evaporated to give a yellow oil. The crude product was washed with hexane (3 × 10 mL), dissolved in DCM, and an equal volume of EtOH added slowly. The solution was left to recrystallise at room temperature to give yellow crystals: yield 1.1 g (56%); 1H NMR (CDCl3, 400 MHz,) δ/ppm: 7.59–6.96 (m, 20 H P(C6H5)2 and 2H xanthene ring), 6.32 (bs, 2H), 2.38 (t, J = 7.5 Hz, 4H), 1.62 (s, 6H), 1.48–0.98 (m, 16H), 0.84 (t, J = 6.9 Hz, 6H); 13C NMR (CDCl3, 101 MHz) δ/ppm: 150.9 (t, J (P,C) = 19.6 Hz, CO), 137.7 (dd, J (P,C) = 7.2, 5.9 Hz, phenyl C-ipso, PC), 137.1 (C), 133.9 (t, J (P,C) = 10.4 Hz, CH phenyl), 131.9 (CH), 129.5 (C), 128.0–128.5 (m, CH phenyl), 126.2 (CH), 125.1 (dd, J = 10.6, 2.4 Hz, CHC-P), 35.3 (CH2), 31.9 (CH3), 31.6 (CH2), 31.2 (CH2), 28.6 (CH2), 22.6 (CH2), 14.1 (CH3); 31P NMR (CDCl3, 162 MHz) δ/ppm: −17.8 (s); IR (neat) ν/cm−1 3069, 3054, 2955, 2921, 2831, 1585, 1569, 1419, 1252, 1240, 737, 692; HR-MS (ESI): [M + H]+ m/z+ 747.3878, calcd. for C51H57OP2: 747.3879.

Experimental details

Non-hydrogen atoms were initially refined isotropically and then by anisotropic refinement with the full-matrix least-squares method against F2 using the SHELXL program [2] and molecular graphics were done using ORTEP-3 [3]. All hydrogen atoms were positioned geometrically, allowed to ride on their parent atoms and refined isotropically. The C—Haromatic, C—Hmethylene and C—Hmethyl distances were constrained to 0.950 Å, 0.99 Å and 0.98 Å.

Comment

Phosphorus is a very good heteroatom for ligand design as it can form particularly strong chelate complexes with late transition metals, as explained by hard soft acid base theory. Furthermore, the possibility of analysis by 31P NMR makes it an excellent choice for developing new ligands [4]. We have been particularly interested in bidentate phosphorus ligands with wide bite angles, with a focus upon the steric and electronic properties of the chiral phosphorus moieties [5], [6]. In this paper we report the synthesis and crystal structure of (2,7-dihexyl-9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane).

The asymmeric unit contains half a molecule of the title compound with an inversion centre at the pyranyl ring. In this structure, the n-hexyl chains project away from the xanthene rings in an extended zigzag, anti-conformation. The addition of alkyl group substituents to phenyl rings can result in the loss of aromaticity and subsequent solubility increase in a wider variety of polar and apolar solvents [7], [8]. The xanthene backbone is comparably planar with a smaller dihedral angle of 8.27(2)° when compared to values obtained for two different crystals of xantphos, 23.43(2)° [9] and 23.75(2)° [10]. A relatively longer intramolecular P—P distance of 4.181(2) Å compared to xantphos, 4.046(2) Å [9] and 4.059(2) Å [7] is also found for this compound. Other geometric paramteres are within the expected ranges [11].

Acknowledgements

This research was supported by grants from the National Research Foundation (NRF), South Africa. We thank Mr Sizwe J. Zamisa for assistance with X-ray crystallography.

References

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Received: 2019-10-16
Accepted: 2019-11-11
Published Online: 2019-12-20
Published in Print: 2020-02-25

©2019 Nonjabulo Nyalungu et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 Public License.

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  63. Crystal structure of 3-methyl-3-(2,4,5-trimethyl-3,6-dioxocyclohexa-1,4-dien-1-yl)butanoic acid, C14H18O4
  64. The crystal structure of 3-bromo-6-methoxy-2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine, C13H19BBrNO3
  65. The crystal structure of 6-methyl-3,20-dioxo-19-norpregna-4,6-dien-17-yl acetate–2,4-dihydroxybenzoic acid (1/1), C30H36O8
  66. The crystal structure of (5-chloro-2-hydroxy-N-(4-methoxy-2-oxidobenzylidene)benzohydrazonato-κ3N,O,O′)-(pyridine-κ1N)copper(II), C20H16ClCuN3O4
  67. Crystal structure of (E)-2-cyano-N′-(1-(3-ethylpyrazin-2-yl)ethylidene)acetohydrazide, C11H3N5O
  68. Crystal structure of (2,7-dihexyl-9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane), C51H56OP2
  69. Crystal structure of 5-((bis(pyridin-2-ylmethyl)amino)methyl)quinolin-8-ol, C22H20N4O
  70. Crystal structure of 3-(2-(5-(4-fluorophenyl)-3-(4-methylphenyl)-4,5-dihydro-1H-pyrazol-1-yl)thiazol-4-yl)-2H-chromen-2-one, C28H20FN3O2S
  71. The crystal structure of [(tetra-μ2-2,6-difluorobenzoato-κ2O:O′)-bis-(2,6-difluorobenzoato-κ2O:O′)-bis-(1,10-phenanthroline-κ2N:N′)]dierbium(III) C66H34N4O12F12Er2
  72. Crystal structure of bis(3-chloro-N-(1-(pyrazin-2-yl)ethylidene)benzohydrazonato-k3N,N′,O)nickel(II), C26H20N8O2Cl2Ni
  73. Crystal structure of (E)-3-(3-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-4-yl)-1-phenylprop-2-en-1-one, C27H21N5O
  74. Crystal structure of (E)-N′-((4-aminophenyl)sulfonyl)-N,N-dimethylformimidamide, C9H13N3O2S
  75. Crystal structure of η6-p-cymene-iodido-(N-isopropyl-1-(pyridin-2-yl)methanimine-κ2N,N′)ruthenium(II) hexafluorophosphate(V), C19H26IN2F6Ru
  76. Crystal structure of 6-iodo-3-phenyl-2-propylquinazolin-4(3H)-one, C17H15IN2O
  77. Low temperature redetermination of the crystal structure of catena-poly[[tri-4-fluorobenzyltin(IV)]μ2-pyridine-4-carboxylato-κ2N:O], {C27H22F3NO2Sn}n
  78. Crystal structure of bis(2-propyl-1H-benzo[d]imidazol-3-ium) tetrachloridozincate(II), C10H13Cl4N2Zn
  79. The crystal structure of (Z)-3-hydrazono-5-nitroindolin-2-one – dimethyl sulfoxide (1/1), C8H6N4O3
  80. Crystal structure of bis-[N-(1-pyrazin-2-yl-ethylidene)-cyanoacetic acid-hydrazonato-κ3O,N,N′)]-zinc(II), C18H16N10O2Zn
  81. Crystal structure and photochromism of 1-(2,5-dimethyl-3-thienyl)-2-[2-methyl-5-(benzaldoxime)-3-thienyl] perfluorocyclopentene, C23H17F6NOS2
https://doi.org/10.1515/ncrs-2019-0769
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Articles in the same Issue

  1. Frontmatter
  2. Synthesis and crystal structure of bis{5-fluorine-2-(((4-(1-(methoxy-imino)ethyl)phenyl) imino)methyl)phenolato-κ2N,O}copper(II), C32H28CuF2N4O4
  3. Redetermination of the crystal structure of N′-(3-ethoxy-2-hydroxybenzylidene)-4-fluorobenzohydrazide monohydrate, C16H17FN2O4
  4. The crystal structure of (E)-N′-(1-(3-chloro-4-fluorophenyl) ethylidene)-2-hydroxybenzohydrazide, C15H12ClFN2O2
  5. Crystal structure of (E)-N-[4-(1H)-imidazolyl phenyl]-(2-methylphenyl)methanimine, C17H15N3
  6. The crystal structure of 1-benzyl-4-(2-(phenylethynyl)phenyl)-1H-1,2,3-triazole, C23H17N3
  7. Crystal structure of catena-poly[{μ2-1,5-bis(diphenylphosphanyl)pentane-κ2P:P′}dichloridocadmium(II)], C29H30CdCl2P2
  8. Crystal structure of methyl (E)-N2-((3-methylquinolin-8-yl)sulfonyl)-Nω′-nitro-L-argininate - ethanol (1/1), C19H28N6O7S
  9. The crystal structure of trans-carbonyl-(diphenylcyclohexyl-phosphine-κP)iodidomethyl-(2-oxopyridin-1(2H)-olato-κ2O,O′)rhodium(III), C25H28INO3PRh
  10. Crystal structure of N-(amino(pyrazin-2-yl)methylene)-6-methylpyridin-1-ium-3-carbohydrazonate-κ3O,N,N′)-(dinitrato-κ1O)zinc(II), C12H12N8O7Zn
  11. The crystal structure of dichlorido-(tris(2-benzimidazolylmethyl)amine-κ4N,N′,N′′,N′′′)chromium(III) chloride — methanol (1/3), CrC27H33Cl3N7O3
  12. Crystal structure of catena-poly[aqua(μ4-piperazine-1,4-bis(2-hydroxypropanesulfonato-κ8O,O′:O′,N:N′,O′′:O′′,O′′′))silver(I)], C10H24Ag2N2O10S2
  13. Crystal structure of bis(μ3-oxido)-bis(μ2–2,3,4,5-tetrafluorobenzoato-κ2O:O′)-bis(2,3,4,5-tetrafluorobenzoato-κO)-oktakis(3-chlorobenzyl-κC)tetratin(IV), C84H52Cl8F16O10Sn4
  14. Crystal structure of (E)-1-{4-[(4-fluoro-2-hydroxybenzylidene)amino]phenyl}ethanone O-methyl oxime, C16H15FN2O2
  15. Crystal structure of catena-[(bis(O,O′-diethyl dithiophosphato-S,S′)-μ2-1,2-bis(3-pyridylmethylene)hydrazine-N,N′)zinc(II)], {C20H30N4O4P2S4Zn}n
  16. Crystal structure of methyl 2-(4-(3-iodopyrazolo[1,5-a]pyrimidin-6-yl)phenyl)acetate, C15H12IN3O2
  17. Crystal structure of hexacarbonyl-(μ2-methanoato-k2O:O′)-(μ2–bis(di-p-tolylphosphino)cyclohexylamine-κ2P:P′)dirhenium(I), C42H45NO8P2Re2
  18. The cocrystal structure of 1′-hydroxy-1H,1′H-[5,5′-bitetrazol]-1-olate and 1,10-phenanthrolin-1-ium, C14H10N10O2
  19. The crystal structure of 1-benzyl-2-((4-(tert-butyl)phenyl)ethynyl)pyridin-1-ium bromide,C24H24BrN
  20. Crystal structure of (5,5′-bitetrazole-1,1′-diolate)-bis(1,10-phenanthroline)-copper(II), C26H16CuN12O2
  21. Crystal structure of bis(ammonium) diaqua-tetrakis(4-hydroxybenzoato)-manganese(II) tetrahydrate, [NH4]2[C28H24MnO14] ⋅ 4(H2O)
  22. The crystal structure of 3-chloro-1-hydrazino-2,4,6-trinitrobenzene, C6H4ClN5O6
  23. Crystal structure of catena-[(μ2-pyrazine-κ2N:N′)-bis(O,O′-di-ethyldithiophosphato-κ2S,S′)cadmium(II)], {C12H24CdN2O4P2S4}n
  24. Crystal structure of catena-poly[(μ2-pyrazine-N,N′)-bis(O,O′-di-isopropyldithiophosphato-S,S′)cadmium(II) acetonitrile di-solvate], [C16H32CdN2O4P2S4⋅2(C2H3N)]n
  25. Crystal structure of catena-poly{(μ2-N1,N2-bis[(pyridin-4-yl)methyl]ethanediamide-κ2N:N′)-bis(O,O′-di-isopropyldithiophosphato-κ1S)zinc(II)} — acetonitrile (1/1), C26H42N4O6P2S4Zn⋅C2H3N
  26. Crystal structure of tetraqua-bis(4-(hydroxymethyl)benzoato-κO)cobalt(II), C16H22O10Co
  27. Crystal structure of catena-[(bis(O,O′-diethyl dithiophosphato-S,S′)-μ2-1,2-bis(4-pyridylmethylene)hydrazine-N,N′)cadmium(II)], {C20H30CdN4O4P2S4}n
  28. Crystal structure of catena-poly[(μ2-1,2-bis(3-pyridylmethylene)hydrazine-κ2N:N′)-bis(O,O′-dimethyl dithiophosphato-κ2-S,S′)cadmium(II)], {C16H22CdN4O4P2S4}n
  29. Crystal structure of catena-poly[(bis(O,O′-diethyl dithiophosphato-κ2S,S′)-μ2-1,2-bis(3-pyridylmethylene)hydrazine-κ2N:N′)cadmium(II)], {C20H30CdN4O4P2S4}n
  30. The crystal structure of catena-poly[(E)-2-(((5-((trimethylstannyl)thio)-1,3,4-thiadiazol-2-yl)imino)methyl)phenol], C12H15N3OS2Sn
  31. Crystal structure of dichlorido(N-o-tolyl-1,1-di-p-tolylphosphanamine–κ1P)-(methoxydi-p-tolylphosphane-κ1P)palladium(II), C36H39Cl2NOP2Pd
  32. The crystal structure of the triclinic polymorph of hexameric (trimethylsilyl)methyllithium, C24H66Li6Si6
  33. Crystal structure of bis(hydroxydi(pyridin-2-yl)methanolato-κ3N,N′O)cobalt(III) 7,7,8,8-tetracyanoquinodimethane, C34H22CoN8O4
  34. Synthesis and crystal structure of benzyl 5-oxo-5-phenyl-2-(quinolin-2-yl)pentanoate, C27H23NO3
  35. Crystal structure of 5,5-dimethyl-3-oxocyclohex-1-en-1-yl 4-(2,2-dichloroacetyl)-3,4-dihydro-2 H-benzo[b][1,4]oxazine-7-carboxylate, C19H19Cl2NO5
  36. Crystal structure of dipentyl 2,5-dihydroxycyclohexa-1,4-diene-1,4-dicarboxylate, C18H28O6
  37. The crystal structure of catena-poly[diaqua-(μ4-5-(benzo[d]thiazol-2-yl)benzene-1,3-dicarboxylate-κ4O,O′:O′′,O′′′)-(μ4-5-(benzo[d]thiazol-2-yl)benzene-1,3-dicarboxylate-κ4O,O′:O′′,O′′′)dicadmium(II)], C30H18Cd2N2O10S2
  38. Crystal structure of 2,7-diiodo-1,3,6,8-tetramethyl-bis(difluoroboron)-1,2-bis((1H-pyrrol-2-yl)methylene)hydrazine, C14H14B2F4I2N4
  39. A dinuclear Eu(III) complex in the crystal structure of dodecaaqua-bis(μ2-4-(1H-tetrazol-5-yl)benzoato-κ2O:O′) bis(5-(4-carboxylatophenyl)tetrazol-1-ide) tetrahydrate, C32H50Eu2N16O24
  40. Crystal structure and anti-inflammatory activity of (3E,5E)-3-(2-fluorobenzylidene)-1-((4-fluorophenyl)sulfonyl)-5-(pyridin-3-ylmethylene)piperidin-4-one, C24H18F2N2O3S
  41. Crystal structure and anti-inflammatory activity of (3E,5E)-3-(2-fluorobenzylidene)-1-((4-acetamidophenyl)sulfonyl)-5-(pyridin-3-ylmethylene)piperidin-4-one-methanol-hydrate (2/1/1), C53H50F2N6O10S2
  42. Crystal structure of 4-dimethylamino-pyridin-1-ium uracil-1-acetate, C13H16N4O4
  43. Crystal structure of dimethylammonium 5-fluorouracil-1-acetate, C8H12N3O4F
  44. Crystal structure of bis(N′-((5-(ethoxycarbonyl)-1H-pyrrol-2-yl)methylene)-N-ethylcarbamohydrazonothioato-κ2N,O)nickel(II), C22H30N8O4S2Ni
  45. Crystal structure of chlorido-(η5-pentamethylcyclopentadienyl)-((bis-pyrazol-1-yl)methane-κ2N,N′) rhodium(III) hexafluorophosphate. (C17H23ClN4RhF6P)
  46. The crystal structure of 5-(benzofuran-2-carbonyl)-N-cyclohexyl-5,6-dihydrophenanthridine-6-carboxamide, C29H26N2O3
  47. The crystal structure of 2-oxo-2H-chromen-4-yl acetate, C11H8O4
  48. The crystal structure of 2-nitroisophthalic acid, C8H5NO6
  49. Crystal structure of 3-fluoro-9-methoxy-4b,5,14,15-tetrahydro-6H-isoquinolino [2′,1′:1,6]pyrazino[2,3-b]quinoxaline, C19H17FN4O
  50. Crystal structure of (4-fluorobenzyl-κC)(bis(2-hydroxyethyl) carbamodithioato-κ2S,S′)(2,2′-imino-diethanolato-κ3N,O,O′)tin(IV), C16H25FN2O4S2Sn
  51. Crystal structure and anti-inflammatory activity of (3E,5E)-1-((4-bromophenyl)sulfonyl)-3-(pyridin-4-ylmethylene)-5-(2-(trifluoromethyl)benzylidene)piperidin-4-one, C25H18BrF3N2O3S
  52. Crystal structure and anti-inflammatory activity of (3E,5E)-1-((4-chlorophenyl)sulfonyl)-3-(pyridin-4-ylmethylene)-5-(2-(trifluoromethyl)benzylidene)piperidin-4-one, C25H18ClF3N2O3S
  53. The crystal structure of 3-((1R,2S)-1-methylpyrrolidin-1-ium-2-yl)pyridin-1-ium tetrachloridomanganate(II), C10H16Cl4MnN2
  54. The crystal structure of 3-carboxy-5-methylpyridin-1-ium-2-carboxylate, C8H7NO4
  55. Crystal structure of bis(3-methoxy-N-(1-(pyridin-2-yl)ethylidene)benzohydrazonato κ3O,N,N′)zinc(II), C30H28N6O4Zn
  56. Crystal structure of dichlorido-(4,4′-dichloro-2,2′-bipyridine-κ2N,N′)platinum(II) — acetone (1/1), C13H12Cl4N2PtO
  57. Crystal structure of diethyl 6,12-bis(4-fluorophenyl)-2,10-dimethoxy-3,9-diphenyl-3,9-diazatetracyclo[6.4.0.02,7.04,11]dodecane-1,5-dicarboxylate, C42H42F2N2O6
  58. Synthesis and crystal structure of (1E,3E)-2-hydroxy-5-methylisophthalaldehyde O,O-di(2-((((E)-(2-hydroxynaphthalen-1-yl)methylene)amino)oxy)ethyl) dioxime, C35H32N4O7
  59. The crystal structure of 2-phenyl-4,6-bis(prop-2-yn-1-yloxy)-1,3,5-triazine, C15H11N3O2
  60. Crystal structure of 7-(2-{4-[(4-bromophenyl)methyl]piperazin-1-yl}ethoxy)-2H-chromen-2-one, C22H23BrN2O3
  61. Crystal structure of bis-[N-(3-ethyl-1-pyrazin-2-yl-ethylidene)-3-bromo-benzoic acid-hydrazonato-κ3O,N,N′)]-cadmium(II), C30H28N8O2Br2Cd
  62. Crystal structure of 6-(4-fluorophenyl)-4-methoxy-2H-pyran-2-one, C12H9FO3
  63. Crystal structure of 3-methyl-3-(2,4,5-trimethyl-3,6-dioxocyclohexa-1,4-dien-1-yl)butanoic acid, C14H18O4
  64. The crystal structure of 3-bromo-6-methoxy-2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine, C13H19BBrNO3
  65. The crystal structure of 6-methyl-3,20-dioxo-19-norpregna-4,6-dien-17-yl acetate–2,4-dihydroxybenzoic acid (1/1), C30H36O8
  66. The crystal structure of (5-chloro-2-hydroxy-N-(4-methoxy-2-oxidobenzylidene)benzohydrazonato-κ3N,O,O′)-(pyridine-κ1N)copper(II), C20H16ClCuN3O4
  67. Crystal structure of (E)-2-cyano-N′-(1-(3-ethylpyrazin-2-yl)ethylidene)acetohydrazide, C11H3N5O
  68. Crystal structure of (2,7-dihexyl-9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane), C51H56OP2
  69. Crystal structure of 5-((bis(pyridin-2-ylmethyl)amino)methyl)quinolin-8-ol, C22H20N4O
  70. Crystal structure of 3-(2-(5-(4-fluorophenyl)-3-(4-methylphenyl)-4,5-dihydro-1H-pyrazol-1-yl)thiazol-4-yl)-2H-chromen-2-one, C28H20FN3O2S
  71. The crystal structure of [(tetra-μ2-2,6-difluorobenzoato-κ2O:O′)-bis-(2,6-difluorobenzoato-κ2O:O′)-bis-(1,10-phenanthroline-κ2N:N′)]dierbium(III) C66H34N4O12F12Er2
  72. Crystal structure of bis(3-chloro-N-(1-(pyrazin-2-yl)ethylidene)benzohydrazonato-k3N,N′,O)nickel(II), C26H20N8O2Cl2Ni
  73. Crystal structure of (E)-3-(3-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-4-yl)-1-phenylprop-2-en-1-one, C27H21N5O
  74. Crystal structure of (E)-N′-((4-aminophenyl)sulfonyl)-N,N-dimethylformimidamide, C9H13N3O2S
  75. Crystal structure of η6-p-cymene-iodido-(N-isopropyl-1-(pyridin-2-yl)methanimine-κ2N,N′)ruthenium(II) hexafluorophosphate(V), C19H26IN2F6Ru
  76. Crystal structure of 6-iodo-3-phenyl-2-propylquinazolin-4(3H)-one, C17H15IN2O
  77. Low temperature redetermination of the crystal structure of catena-poly[[tri-4-fluorobenzyltin(IV)]μ2-pyridine-4-carboxylato-κ2N:O], {C27H22F3NO2Sn}n
  78. Crystal structure of bis(2-propyl-1H-benzo[d]imidazol-3-ium) tetrachloridozincate(II), C10H13Cl4N2Zn
  79. The crystal structure of (Z)-3-hydrazono-5-nitroindolin-2-one – dimethyl sulfoxide (1/1), C8H6N4O3
  80. Crystal structure of bis-[N-(1-pyrazin-2-yl-ethylidene)-cyanoacetic acid-hydrazonato-κ3O,N,N′)]-zinc(II), C18H16N10O2Zn
  81. Crystal structure and photochromism of 1-(2,5-dimethyl-3-thienyl)-2-[2-methyl-5-(benzaldoxime)-3-thienyl] perfluorocyclopentene, C23H17F6NOS2
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