Home Physical Sciences Crystal structure of (S)-N-(10-((2,2-dimethoxyethyl)amino)-1,2,3-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl)acetamide, C25H32N2O7
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Crystal structure of (S)-N-(10-((2,2-dimethoxyethyl)amino)-1,2,3-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl)acetamide, C25H32N2O7

  • Yuxin Yang ORCID logo , Xinhe Zhou , Yuan Gao , Zhengbin Tang , Muxin Zhang , Yantong Sun and Xiaoping Zhou EMAIL logo
Published/Copyright: July 30, 2025
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Zeitschrift für Kristallographie - New Crystal Structures
From the journal Zeitschrift für Kristallographie - New Crystal Structures Volume 240 Issue 5

Abstract

C25H32N2O7, Tetragonal, P43212, a = 9.0226 (8) Å, c = 59.048 (6) Å, V = 4806.9(10) Å3, Z = 8, Rgt(F) = 0.043, wRref(F2) = 0.112, T = 100 K.

CCDC no.: 2421334

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: Colourless block
Size 0.12 × 0.11 × 0.10 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 0.10 mm−1
Diffractometer, scan mode: Bruker PHOTON-II area detector, φ and ω scans
θmax, completeness: 26.8°, 100 %
N(hkl)measured, N(hkl)unique, Rint: 127638, 5134, 0.058
Criterion for Iobs, N(hkl)gt: Iobs > 2 σ(Iobs), 4,822
N(param)refined: 313
Programs: Bruker, 1 Olex2, 2 SHELX 3 , 4
Table 2:

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

x y z Uiso*/Ueq
O1 1.1362 (2) 1.0533 (2) 0.32888 (4) 0.0272 (5)
O2 0.9917 (3) 1.0767 (3) 0.29590 (4) 0.0310 (5)
O3 0.7118 (2) 0.7517 (2) 0.26921 (3) 0.0174 (4)
O4 0.5687 (2) 0.3271 (2) 0.36141 (3) 0.0161 (4)
O5 0.4949 (2) 0.0552 (2) 0.38037 (3) 0.0156 (4)
O6 0.4719 (2) −0.1867 (2) 0.35447 (3) 0.0169 (4)
O7 0.2391 (2) 0.5363 (2) 0.30355 (3) 0.0236 (5)
N1 0.8979 (3) 0.7897 (3) 0.30090 (4) 0.0166 (5)
H1 0.873993 0.848915 0.289643 0.020*
N2 0.3277 (2) 0.3967 (2) 0.27457 (4) 0.0138 (4)
H2 0.323223 0.378569 0.259943 0.017*
C1 1.0151 (3) 0.8412 (3) 0.31577 (5) 0.0185 (6)
H1A 1.112702 0.810875 0.309666 0.022*
H1B 1.003254 0.796577 0.330978 0.022*
C2 1.0074 (3) 1.0091 (3) 0.31747 (5) 0.0223 (6)
H2A 0.919666 1.036293 0.326952 0.027*
C3 1.1330 (4) 1.2042 (3) 0.33578 (6) 0.0277 (7)
H3A 1.108166 1.266975 0.322784 0.042*
H3B 1.230545 1.232512 0.341682 0.042*
H3C 1.058212 1.217167 0.347650 0.042*
C4 1.1124 (5) 1.0517 (5) 0.28124 (7) 0.0484 (11)
H4A 1.113393 1.127753 0.269397 0.073*
H4B 1.102674 0.953604 0.274270 0.073*
H4C 1.205078 1.056321 0.289870 0.073*
C5 0.8217 (3) 0.6625 (3) 0.30230 (4) 0.0133 (5)
C6 0.7092 (3) 0.6512 (3) 0.28423 (4) 0.0131 (5)
C7 0.5996 (3) 0.5382 (3) 0.28323 (4) 0.0140 (5)
H7 0.532036 0.551598 0.271055 0.017*
C8 0.5690 (3) 0.4135 (3) 0.29594 (4) 0.0121 (5)
C9 0.6502 (3) 0.3575 (3) 0.31459 (4) 0.0119 (5)
C10 0.7775 (3) 0.4231 (3) 0.32340 (4) 0.0141 (5)
H10 0.822123 0.367530 0.335239 0.017*
C11 0.8522 (3) 0.5535 (3) 0.31836 (4) 0.0144 (5)
H11 0.938000 0.571241 0.327289 0.017*
C12 0.4371 (3) 0.3187 (3) 0.28818 (4) 0.0128 (5)
H12 0.386439 0.278587 0.301938 0.015*
C13 0.4955 (3) 0.1868 (3) 0.27416 (4) 0.0151 (5)
H13A 0.412577 0.117987 0.271022 0.018*
H13B 0.532924 0.223950 0.259457 0.018*
C14 0.6201 (3) 0.1016 (3) 0.28621 (4) 0.0152 (5)
H14A 0.629548 0.001729 0.279416 0.018*
H14B 0.715177 0.154364 0.283945 0.018*
C15 0.5898 (3) 0.0866 (3) 0.31140 (4) 0.0136 (5)
C16 0.6026 (3) 0.2135 (3) 0.32494 (4) 0.0122 (5)
C17 0.5689 (3) 0.2012 (3) 0.34815 (4) 0.0130 (5)
C18 0.5247 (3) 0.0662 (3) 0.35748 (4) 0.0128 (5)
C19 0.5140 (3) −0.0596 (3) 0.34367 (4) 0.0143 (5)
C20 0.5460 (3) −0.0489 (3) 0.32067 (4) 0.0147 (5)
H20 0.538051 −0.133946 0.311261 0.018*
C21 0.6830 (3) 0.3319 (4) 0.37843 (5) 0.0232 (6)
H21A 0.780426 0.331262 0.371085 0.035*
H21B 0.674076 0.245227 0.388337 0.035*
H21C 0.672347 0.422491 0.387440 0.035*
C22 0.3394 (3) 0.0645 (3) 0.38558 (5) 0.0204 (6)
H22A 0.284658 −0.006598 0.376222 0.031*
H22B 0.303792 0.164988 0.382433 0.031*
H22C 0.323926 0.041328 0.401617 0.031*
C23 0.4796 (3) −0.3212 (3) 0.34170 (5) 0.0200 (6)
H23A 0.404895 −0.319228 0.329664 0.030*
H23B 0.460887 −0.405680 0.351728 0.030*
H23C 0.578449 −0.330791 0.334968 0.030*
C24 0.2328 (3) 0.4959 (3) 0.28364 (5) 0.0179 (6)
C25 0.1182 (4) 0.5555 (4) 0.26727 (5) 0.0322 (8)
H25A 0.020261 0.516551 0.271296 0.048*
H25B 0.143453 0.524597 0.251836 0.048*
H25C 0.116574 0.664000 0.268082 0.048*

1 Source of materials

A solution of colchicine (400 mg, 1.0 mmol) and 2,2-dimethoxyethan-1-amine (1.05 g, 10.0 mmol) was stirred in ethanol at reflux for 3 h. Following evaporation, the mixture was extracted with ethyl acetate (3 × 10 mL), and then the solvent was removed to obtain a yellow solid, which was subsequently dissolved in 90 % methanol and slowly evaporated to obtain crystals.

2 Experimental details

A suitable crystal was selected and tested on a Bruker D8 VENTURE diffractometer 1 . Using Olex2 1 , the structure was solved with the SHELXT 2 structure solution program Intrinsic Phasing and refined with the SHELX 3 refinement package using Least Squares minimisation.

3 Comment

Colchicine, one of the oldest drugs and one of the most famous natural molecules, is found mainly in plants of the genus Colchicine, the genus androcymbium, and the genus gloriosa. 4 Colchicine and its derivatives have anti-tumor, anti-gout and other biological activities. 5 We synthesized a colchicine derivative in this study.

A view on the structure of the title molecule is shown in the figure. The compound contains a three-methoxy modified benzene ring and a tropone. And the amine group of 2,2-dimethoxyethan-1-amine successfully replaced the methoxy ring of tropone. N–C single bond distance (N1–C5) is 1.340 (3) Å. N–C single bond distance (N1–C1) is 1.451(3) Å. The dihedral angle of benzene ring and the tropone is 55.635(75)°. All the bond lengths and angles are in the expected ranges. 6 , 7

Corresponding author: Xiaoping Zhou, School of Pharmaceutical Science, Jilin University, Changchun 130022, P.R. China, E-mail:

  1. Conflict of interest: The authors declare no conflicts of interest regarding this article.

  2. Research funding: This work was financially supported by Jilin Provincial Science and Technology Development Plan Project (grant No. 20220204033YY).

  3. Author contribution: All the authors have accepted responsibility for the manuscript and approved submission.

References

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Received: 2025-01-06
Accepted: 2025-02-04
Published Online: 2025-07-30
Published in Print: 2025-10-27

© 2025 the author(s), published by De Gruyter, Berlin/Boston

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

Articles in the same Issue

  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of (S)-N-(10-((2,2-dimethoxyethyl)amino)-1,2,3-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl)acetamide, C25H32N2O7
  4. The crystal structure of 6,6′-difluoro-3,3′-dimethyl-5,5′-di(10H-phenoxazin-10-yl)- [1,1′-biphenyl]-2,2′-dicarbonitrile, C40H24F2N4O2
  5. Crystal structure of poly[(di-ethylenediamine-κ2N,N′)cadmium(II) tetradedocyloxidohexavanadate] (V4+/V5+ = 2/1), C4H16CdN4O14V6
  6. The crystal structure of poly[bis(dimethylformamide-κ1N)-(μ4-2′,3,3″,5′-tetrakis(trifluoromethyl)-[1,1′:4′,1″-terphenyl]-4,4″-dicarboxylato-κ4 O,O′: O″,O‴)dicadmium(II)], C27H15CdF12NO5
  7. Crystal structure of bis(μ2-ferrocenylcarboxylato-O,O′)-(μ3-oxido-κ3O:O:O)-bis(μ2-salicyladoximato-κ2N,O,O′)-(μ2-isopropoxo)-tris(isopropoxy-κ1O trititanium(IV)), C48H55N2O13Fe2Ti3
  8. Crystal structure of 3-(diethylamino)-7,9,11-trimethyl-8-phenyl-6H,13H-12λ4,13λ4-chromeno[3′,4′:4,5]pyrrolo[1,2-c]pyrrolo[2,1-f][1,3,2]diazaborinin-6-one, C28H26BF2N3O2
  9. The crystal structure of catena-poly[aqua-μ2-2-nitro-benzene-1,3-dicarboxylato-κ2O,O′)-(1,10-phenanthroline-κ2N,N′)-zinc(II)], C20H13N3O7Zn
  10. Crystal structure of poly[diaqua-{μ3-1-(3-carboxylatophenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylato-κ4O,O′:O′′:O′′′′}manganese(II)] hydrate
  11. Crystal structure of N′-((1-hydroxycyclohexyl)(phenyl)methyl)-2-methoxybenzohydrazide methanol solvate, C22H28N2O4
  12. The cocrystal of caffeic acid — progesterone — water (1/2/1), C51H70O9
  13. Crystal structure of (((oxido(quinolin-6-yl)methoxy)triphenyl-λ5-stibanyl)oxy)(quinolin-7-yl)methanolate
  14. Crystal structure of [(E)-6′-(diethylamino)-2-(2-(((E)-pyren-1-ylmethylene)amino)ethyl)-4′-(2-((E)-1,3,3-trimethylindolin-2-ylidene)ethylidene)-1′,2′,3′,4′-tetrahydrospiro[isoindoline-1,9′-xanthen]-3-one]-methanol, solvate C57H56N4O3
  15. The crystal structure of 1-(acridin-9-yl)pyrrolidine-2,5-dione, C17H22N2O2
  16. Crystal structure of N-(4-acetylphenyl)-2-(6-methoxynaphthalen-2-yl)propanamide, C22H21NO3
  17. The crystal structure of 5,10,15,20-tetrakis(4-(1H-1,2,4-triazol-1-yl)phenyl)porphyrin, C52H34N16
  18. Crystal structure of hexacarbonyl-μ2-[phenylmethanedithiolato-κ4S:S,S′:S′]diiron (Fe–Fe) C13H6Fe2O6S2
  19. Crystal structure of diiodo-bis(1-((2-propyl-1H-benzo[d]imidazol-1-yl)methyl)-1H-benzo[d][1,2,3]triazole-κ1N)cadmium(II), C34H34CdI2N10
  20. Crystal structure of (E)-(3-(3-bromophenyl)acryloyl)ferrocene, C19H15BrFeO
  21. Crystal structure of catena-poly(μ2-6-chloropyridine-2-carboxylato-κ3N,O:O′)(6-chloropyridine-2-carboxylato-κ2O,N)copper(II), C12H6Cl2N2O4Cu
  22. Crystal structure of poly[diaqua-μ 3-(5-(3,5-dicarboxy-2,4,6-trimethylbenzyl)-2,4,6-trimethylisophthalato)-κ 6O,O′:O″,O‴:O‴′,O‴″) terbium(III)-monohydrate], C23H28TbO12
  23. Crystal structure of (E)-2-(((5-chloro-3-methyl-1-phenyl-1H-pyrazol-4-yl)methylene)amino)-3′,6′-dihydroxyspiro[isoindoline-1,9′-xanthen]-3-one – ethanol (1/2), C35H33ClN4O6
  24. The crystal structure of 3-(5-amino-3-phenylisoxazol-4-yl)-4-chloro-3-hydroxyindolin-2-one, C17H12ClN3O3
  25. The crystal structure of dimethylammonium 4-[2-(4-fluorophenyl)-4, 5-diphenyl-1H-imidazol-1-yl]benzenesulfonate, C29H26FN3O3S
  26. Crystal structure of (R)-2-ammonio-3-((5-carboxypentyl)thio)propanoate
  27. Crystal structure of 4-cyclohexyl-5-(thiophen-2-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione, C12H15N3S2
  28. The crystal structure of 4,6-bis(dimethylamino)-2-fluoroisophthalonitrile, C12H13FN4
  29. Hydrogen bonding in the crystal structure of nicotin-1,1′-dium tetrabromidomanganate(II)
  30. The crystal structure of bis(2-bromobenzyl)(2-((2-oxybenzylidene)amino)-4-methylpentanoato-κ3N, O,O′)tin(IV), C27H27Br2NO3Sn
  31. Crystal structure of (E)-(3-(p-tolyl)acryloyl)ferrocene, C20H18FeO
  32. Crystal structure of (E)-7-fluoro-2-((5-(4-methylpiperazin-1-yl)pyridin-2-yl)methylene)-3,4-dihydronaphthalen-1(2H)-one, C21H22FN3O
  33. Crystal structure of (E)-7-methoxy-2-((5-(4-methylpiperazin-1-yl)pyridin-2-yl)methylene)-3,4-dihydronaphthalen-1(2H)-one, C22H25N3O2
  34. The crystal structure of poly(bis(μ2-1,3,5-tri(1H-imidazol-1-yl)benzene-κ2N:N′)-(μ2-2,3,5,6-tetrafluoroterephthalato-κ2O:O′)-manganese(II), C38H24F4N12O4Mn
  35. Crystal structure of (3,4-dimethoxybenzyl)triphenylphosphonium bromide ethanol solvate, C29H32BrO3P
  36. Crystal structure of tetraethylammonium hydrogencarbonate – (diaminomethylene)thiourea – water (2/1/3)
  37. Crystal structure of N, N-Dimethyl-N′-tosylformimidamide, C10H14N2O2S
  38. The crystal structure of ethyl 2-methyl-5-oxo-4-(2-methoxyphenyl)-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate, C20H23N2O4
  39. Crystal structure of bis(μ2-1,5-bis[(E)-1-(2-hydroxyphenyl)ethylidene] thiocarbonohydrazide)-bis(dimethylformamide)-dizinc(II) dimethylformamide solvate, C40H46N10O6S2Zn2⋅C3H7NO
  40. Crystal structure of azido-κ1N{hydridotris(3-tert-butyl-5-methylpyrazol-1-yl)borato-κ3N,N′,N″}copper(II), C24H40BCuN9
  41. The crystal structure of fac-tricarbonyl(1,10-phenanthroline-κ2N,N′)-(azido-κ1N)rhenium(I), C15H8N5O3Re
  42. Crystal structure of 4-((triphenylphosphonio)methyl)pyridin-1-ium tetrachloridozincate(II), C24H22Cl4NPZn
https://doi.org/10.1515/ncrs-2025-0010
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Articles in the same Issue

  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of (S)-N-(10-((2,2-dimethoxyethyl)amino)-1,2,3-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl)acetamide, C25H32N2O7
  4. The crystal structure of 6,6′-difluoro-3,3′-dimethyl-5,5′-di(10H-phenoxazin-10-yl)- [1,1′-biphenyl]-2,2′-dicarbonitrile, C40H24F2N4O2
  5. Crystal structure of poly[(di-ethylenediamine-κ2N,N′)cadmium(II) tetradedocyloxidohexavanadate] (V4+/V5+ = 2/1), C4H16CdN4O14V6
  6. The crystal structure of poly[bis(dimethylformamide-κ1N)-(μ4-2′,3,3″,5′-tetrakis(trifluoromethyl)-[1,1′:4′,1″-terphenyl]-4,4″-dicarboxylato-κ4 O,O′: O″,O‴)dicadmium(II)], C27H15CdF12NO5
  7. Crystal structure of bis(μ2-ferrocenylcarboxylato-O,O′)-(μ3-oxido-κ3O:O:O)-bis(μ2-salicyladoximato-κ2N,O,O′)-(μ2-isopropoxo)-tris(isopropoxy-κ1O trititanium(IV)), C48H55N2O13Fe2Ti3
  8. Crystal structure of 3-(diethylamino)-7,9,11-trimethyl-8-phenyl-6H,13H-12λ4,13λ4-chromeno[3′,4′:4,5]pyrrolo[1,2-c]pyrrolo[2,1-f][1,3,2]diazaborinin-6-one, C28H26BF2N3O2
  9. The crystal structure of catena-poly[aqua-μ2-2-nitro-benzene-1,3-dicarboxylato-κ2O,O′)-(1,10-phenanthroline-κ2N,N′)-zinc(II)], C20H13N3O7Zn
  10. Crystal structure of poly[diaqua-{μ3-1-(3-carboxylatophenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylato-κ4O,O′:O′′:O′′′′}manganese(II)] hydrate
  11. Crystal structure of N′-((1-hydroxycyclohexyl)(phenyl)methyl)-2-methoxybenzohydrazide methanol solvate, C22H28N2O4
  12. The cocrystal of caffeic acid — progesterone — water (1/2/1), C51H70O9
  13. Crystal structure of (((oxido(quinolin-6-yl)methoxy)triphenyl-λ5-stibanyl)oxy)(quinolin-7-yl)methanolate
  14. Crystal structure of [(E)-6′-(diethylamino)-2-(2-(((E)-pyren-1-ylmethylene)amino)ethyl)-4′-(2-((E)-1,3,3-trimethylindolin-2-ylidene)ethylidene)-1′,2′,3′,4′-tetrahydrospiro[isoindoline-1,9′-xanthen]-3-one]-methanol, solvate C57H56N4O3
  15. The crystal structure of 1-(acridin-9-yl)pyrrolidine-2,5-dione, C17H22N2O2
  16. Crystal structure of N-(4-acetylphenyl)-2-(6-methoxynaphthalen-2-yl)propanamide, C22H21NO3
  17. The crystal structure of 5,10,15,20-tetrakis(4-(1H-1,2,4-triazol-1-yl)phenyl)porphyrin, C52H34N16
  18. Crystal structure of hexacarbonyl-μ2-[phenylmethanedithiolato-κ4S:S,S′:S′]diiron (Fe–Fe) C13H6Fe2O6S2
  19. Crystal structure of diiodo-bis(1-((2-propyl-1H-benzo[d]imidazol-1-yl)methyl)-1H-benzo[d][1,2,3]triazole-κ1N)cadmium(II), C34H34CdI2N10
  20. Crystal structure of (E)-(3-(3-bromophenyl)acryloyl)ferrocene, C19H15BrFeO
  21. Crystal structure of catena-poly(μ2-6-chloropyridine-2-carboxylato-κ3N,O:O′)(6-chloropyridine-2-carboxylato-κ2O,N)copper(II), C12H6Cl2N2O4Cu
  22. Crystal structure of poly[diaqua-μ 3-(5-(3,5-dicarboxy-2,4,6-trimethylbenzyl)-2,4,6-trimethylisophthalato)-κ 6O,O′:O″,O‴:O‴′,O‴″) terbium(III)-monohydrate], C23H28TbO12
  23. Crystal structure of (E)-2-(((5-chloro-3-methyl-1-phenyl-1H-pyrazol-4-yl)methylene)amino)-3′,6′-dihydroxyspiro[isoindoline-1,9′-xanthen]-3-one – ethanol (1/2), C35H33ClN4O6
  24. The crystal structure of 3-(5-amino-3-phenylisoxazol-4-yl)-4-chloro-3-hydroxyindolin-2-one, C17H12ClN3O3
  25. The crystal structure of dimethylammonium 4-[2-(4-fluorophenyl)-4, 5-diphenyl-1H-imidazol-1-yl]benzenesulfonate, C29H26FN3O3S
  26. Crystal structure of (R)-2-ammonio-3-((5-carboxypentyl)thio)propanoate
  27. Crystal structure of 4-cyclohexyl-5-(thiophen-2-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione, C12H15N3S2
  28. The crystal structure of 4,6-bis(dimethylamino)-2-fluoroisophthalonitrile, C12H13FN4
  29. Hydrogen bonding in the crystal structure of nicotin-1,1′-dium tetrabromidomanganate(II)
  30. The crystal structure of bis(2-bromobenzyl)(2-((2-oxybenzylidene)amino)-4-methylpentanoato-κ3N, O,O′)tin(IV), C27H27Br2NO3Sn
  31. Crystal structure of (E)-(3-(p-tolyl)acryloyl)ferrocene, C20H18FeO
  32. Crystal structure of (E)-7-fluoro-2-((5-(4-methylpiperazin-1-yl)pyridin-2-yl)methylene)-3,4-dihydronaphthalen-1(2H)-one, C21H22FN3O
  33. Crystal structure of (E)-7-methoxy-2-((5-(4-methylpiperazin-1-yl)pyridin-2-yl)methylene)-3,4-dihydronaphthalen-1(2H)-one, C22H25N3O2
  34. The crystal structure of poly(bis(μ2-1,3,5-tri(1H-imidazol-1-yl)benzene-κ2N:N′)-(μ2-2,3,5,6-tetrafluoroterephthalato-κ2O:O′)-manganese(II), C38H24F4N12O4Mn
  35. Crystal structure of (3,4-dimethoxybenzyl)triphenylphosphonium bromide ethanol solvate, C29H32BrO3P
  36. Crystal structure of tetraethylammonium hydrogencarbonate – (diaminomethylene)thiourea – water (2/1/3)
  37. Crystal structure of N, N-Dimethyl-N′-tosylformimidamide, C10H14N2O2S
  38. The crystal structure of ethyl 2-methyl-5-oxo-4-(2-methoxyphenyl)-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate, C20H23N2O4
  39. Crystal structure of bis(μ2-1,5-bis[(E)-1-(2-hydroxyphenyl)ethylidene] thiocarbonohydrazide)-bis(dimethylformamide)-dizinc(II) dimethylformamide solvate, C40H46N10O6S2Zn2⋅C3H7NO
  40. Crystal structure of azido-κ1N{hydridotris(3-tert-butyl-5-methylpyrazol-1-yl)borato-κ3N,N′,N″}copper(II), C24H40BCuN9
  41. The crystal structure of fac-tricarbonyl(1,10-phenanthroline-κ2N,N′)-(azido-κ1N)rhenium(I), C15H8N5O3Re
  42. Crystal structure of 4-((triphenylphosphonio)methyl)pyridin-1-ium tetrachloridozincate(II), C24H22Cl4NPZn
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