Startseite The crystal structure of 1,3-bis(2,6-diiso-propylphenyl)imidazol-2-ylidene)-dibromido-(1-methyl-1H-imidazole-κ1N)palladium(II) – ethyl acetate – water (1/1/1), C31H42Br2N4Pd
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The crystal structure of 1,3-bis(2,6-diiso-propylphenyl)imidazol-2-ylidene)-dibromido-(1-methyl-1H-imidazole-κ1N)palladium(II) – ethyl acetate – water (1/1/1), C31H42Br2N4Pd

  • Shun-Chao Yin , Yong-Fang Zhou , Ye Li und Peng-Cheng Qian EMAIL logo
Veröffentlicht/Copyright: 20. Oktober 2016

Abstract

C31H42Br2N4Pd, monoclinic, P21/c, a = 12.3093(14)Å, b = 15.2805(18) Å, c = 20.3205(17) Å, β = 112.213(5)°, V = 3538.5(7) Å3, Z = 4, Rgt(F) = 0.0540, wRref(F2) = 0.1528, T = 298(2)K.

CCDC no.:: 1504852

The metal complex of the title crystal structure is shown in the figure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters.

Table 1

Data collection and handling.

Crystal:Yellow blocks
Size:0.31 × 0.25 × 0.23 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:28.1 cm−1
Diffractometer, scan mode:Bruker APEX-II, φ and ω
2θmax, completeness:52.°, >99%
N(hkl)measured, N(hkl)unique, Rint:27750, 6941, 0.031
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 5517
N(param)refined:352
Programs:SHELX [3], PLATON [4], Bruker programs [5]
Table 2

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

AtomxyzUiso*/Ueq
Pd10.14518(3)0.67241(2)0.639188(19)0.04001(13)
Br10.13610(8)0.57655(4)0.73290(4)0.0813(2)
Br20.15002(8)0.76699(5)0.54533(4)0.0838(2)
N10.0412(3)0.8253(2)0.68820(18)0.0323(7)
N20.2285(3)0.8271(2)0.73475(19)0.0349(8)
N30.1579(4)0.5614(3)0.5819(3)0.0631(13)
N40.1551(5)0.4750(4)0.4956(4)0.0781(17)
C10.1374(3)0.7792(3)0.6912(2)0.0326(8)
C20.1895(4)0.9023(3)0.7563(2)0.0418(10)
H20.23610.94560.78580.050*
C30.0733(4)0.9016(3)0.7273(3)0.0409(10)
H30.02300.94420.73240.049*
C4−0.0813(4)0.8001(3)0.6539(2)0.0385(10)
C5−0.1468(4)0.8320(4)0.5859(3)0.0542(13)
C6−0.2645(5)0.8076(5)0.5576(4)0.0768(19)
H6−0.31090.82570.51190.092*
C7−0.3139(5)0.7581(5)0.5947(4)0.088(2)
H7−0.39290.74330.57420.105*
C8−0.2483(5)0.7302(4)0.6613(4)0.0694(17)
H8−0.28310.69620.68590.083*
C9−0.1301(4)0.7516(3)0.6936(3)0.0462(11)
C10−0.0992(6)0.8948(5)0.5475(3)0.0698(17)
H10−0.01330.89370.56970.084*
C11−0.1356(8)0.8736(8)0.4684(4)0.118(3)
H11A−0.11620.81380.46310.176*
H11B−0.09480.91160.44790.176*
H11C−0.21870.88200.44470.176*
C12−0.1414(8)0.9873(5)0.5547(4)0.100(3)
H12A−0.22500.99050.53050.149*
H12B−0.10471.02870.53420.149*
H12C−0.12091.00070.60410.149*
C13−0.0624(5)0.7272(4)0.7711(3)0.0573(13)
H130.02090.72410.77860.069*
C14−0.0763(7)0.7977(5)0.8192(3)0.0741(17)
H14A−0.04780.85220.80850.111*
H14B−0.03230.78230.86780.111*
H14C−0.15770.80360.81180.111*
C15−0.0976(7)0.6382(5)0.7908(5)0.089(2)
H15A−0.04000.61940.83540.134*
H15B−0.10220.59640.75460.134*
H15C−0.17270.64290.79470.134*
C160.3520(4)0.8043(3)0.7597(2)0.0368(9)
C170.4208(4)0.8409(3)0.7260(3)0.0482(11)
C180.5397(5)0.8190(5)0.7531(4)0.0691(17)
H180.58860.84260.73230.083*
C190.5854(5)0.7637(5)0.8094(4)0.0766(19)
H190.66430.74830.82530.092*
C200.5171(5)0.7305(4)0.8429(3)0.0665(16)
H200.55050.69390.88200.080*
C210.3987(4)0.7505(3)0.8197(3)0.0484(11)
C220.3750(5)0.9074(5)0.6671(3)0.0700(17)
H220.28930.90180.64620.084*
C230.4036(8)0.9991(5)0.6965(5)0.107(3)
H23A0.36061.01180.72610.160*
H23B0.38221.04020.65800.160*
H23C0.48621.00350.72410.160*
C240.4206(7)0.8946(8)0.6078(4)0.115(3)
H24A0.50000.91540.62330.172*
H24B0.37240.92690.56660.172*
H24C0.41840.83360.59620.172*
C250.3274(5)0.7202(5)0.8624(3)0.0715(18)
H250.24520.71520.82980.086*
C260.3342(9)0.7885(7)0.9181(4)0.114(3)
H26A0.41370.79340.95140.171*
H26B0.28460.77130.94270.171*
H26C0.30850.84400.89540.171*
C270.3663(7)0.6319(6)0.8976(5)0.114(3)
H27A0.36540.58970.86230.171*
H27B0.31380.61350.91980.171*
H27C0.44440.63660.93280.171*
C280.1329(5)0.5562(5)0.5140(4)0.0725(17)
H280.10350.60210.48220.087*
C290.1982(9)0.4798(5)0.6075(5)0.102(3)
H290.22310.46290.65490.123*
C300.1963(11)0.4279(6)0.5536(6)0.122(4)
H300.21970.36970.55700.146*
C310.1391(9)0.4481(6)0.4246(5)0.117(3)
H31A0.21430.43980.42150.176*
H31B0.09630.49250.39140.176*
H31C0.09590.39420.41350.176*

Source of material

The title product was prepared by modification of the literature known methods [1, 2]. Under a nitrogen atmosphere, 1,3-bis(2,6-diisopropylphenyl)-1H-imidazolium bromide (0.7 mmol), palladium acetate (0.7 mmol), sodium bromide (0.7 mmol), potassium carbonate (0.7 mmol), tetrahydrofuran (5.0 mL) and 1-methylimidazole (2.5 mmol) were successively added into a Schlenk tube. The mixture was stirred under reflux for 12 h. Then it was cooled to room temperature and the solvent was removed under reduced pressure. The residue was purified by flash column chromatography to give the pure product in 42% yield as yellow solid. Crystals suitable for X-ray diffraction were grown in a mixture of ethyl acetate and petroleum ether. mp 275 °C (decomposed). 1H NMR (500 MHz, CDCl3, TMS) δ 7.75 (s, 1H), 7.46 (t, J = 7.5 Hz, 2H), 7.32 (d, J = 7.5 Hz, 4H), 7.24 (s, 1H), 7.12 (s 2H), 6.53 (t, J = 1.5 Hz, 1H), 3.47 (s, 3H), 3.29 (hept, J = 6.5 Hz, 4H), 1.48 (d, J = 6.5 Hz, 12H), 1.10 (d, J = 6.5 Hz, 12H). 13C NMR (125 MHz, CDCl3) δ 156.1, 146.7, 139.9, 135.5, 130.5, 130.0, 125.12, 124.0, 119.0, 33.9, 28.8, 26.3, 23.5. IR (neat) nujol 3134, 2965, 2926, 2858, 1537, 1461, 1407, 1382, 1348, 1278, 1228, 1208, 1110, 1082, 947, 854, 828, 803, 767, 760, 738, 706, 656 cm−1. MS (ESI): 655 [M—Br]+. HRMS (ESI) calcd. for C31H42BrN4Pd [M—Br]+: 655.1628; found: 655.1630. Anal. calcd. for C31H42Br2N4Pd: C, 50.53%; H, 5.74%; N, 7.60%; found: C, 50.73%; H, 5.82%; N, 7.48%.

Experimental details

All hydrogen atoms attached to C atoms were introduced using the HFIX command in the SHELXL program [3]. The C—H distances of CH3 were restrained to 0.96 Å with Uiso values to be 1.5Ueq(C). Vinylic and aromatic C—H distances were restrained to 0.93 Å with Uiso values to be 1.2Ueq(C). The C—H distances of the isopropyl groups were restrained to 0.98 Å with Uiso values to be 1.2Ueq(C). The dataset was massaged using the program SQUEEZE [4]. The residual electron density was assigned to a molecule of the ethyl acetate solvent and one water molecule is present in the crystal [55 e per asymmetric unit; a molecule of ethyl acetate would give 46e and one water molecule gives 10e]

Discussion

During the past years, N-heterocyclic carbene-palladium complexes have been proven efficient catalysts in the traditional cross-coupling reactions [6; 7; 8; 9; 10]. For instance, the synthesis of [1,3-bis(2,6-diisopropylphenyl)-1H-imidazol-2(3H)-ylidene]palladium complex, from easily available starting materials in a one-pot procedure was reported [1]. In addition, the applications of this complex have been fully investigated in Suzuki-Miyaura coupling [2, 11; 12; 13; 14; 15; 16; 17; 18], C—N coupling [1, 19; 20; 21], α-arylation of carbonyl compounds [22; 23; 24; 25; 26], Hiyama coupling [27], Mizoroki-Heck reaction [28] and direct C—H bond functionalization of heteroaromatic compounds [29; 30; 31; 32; 33]. As its analogue, initial studies on the catalytic activity of the title complex showed that it is also an efficient catalyst in the C—N coupling between primary and secondary amines with aryl chlorides at very low catalyst loadings, implying that the anions on the complex may have no effect on the catalytic activity. Therefore, it may draw the conclusion that the title product may be also a good catalyst in the above mentioned and other relevant reactions catalyzed by the NHC—Pd(II)-Im complex, and will also find its new applications in organic synthesis [34].

The title complex shows a slightly distorted square-planar coordination geometry with the two bromido ligands perpendicular to the plane of the NHC ligand and the 1-methylimidazole trans to it. For instance, the bond angles for C(1)—Pd(1)—N(3) is 177.63(18)°, C(1)—Pd(1)—Br(2) is 87.05(12)°, N(3)—Pd(1)—Br(2) is 91.00(16)°, C(1)—Pd(1)—Br(1) is 93.03(12)°, N(3)—Pd(1)—Br(1) is 88.95(15)°, and Br(2)—Pd(1)—Br(1) 178.87(3)°. The bond lengths are all in the expected ranges.

Acknowledgements

I acknowledge the financial support from the Department of Education of Zhejiang Province (No. Y201327597) and Natural Science Foundation of Zhejiang Province (No. LY15B020002) for the publication fee.

References

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Received: 2016-4-6
Accepted: 2016-9-19
Published Online: 2016-10-20
Published in Print: 2017-1-1

©2016 Shun-Chao Yin et al., published by De Gruyter.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Artikel in diesem Heft

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  2. Editorial
  3. Twenty years of crystal structure publication and the road ahead
  4. Crystal Structures
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  21. Crystal structure of 2-amino-5-oxo-4-(3,4,5-trimethoxy-phenyl)-4,5,6,7-tetrahydro-cyclopenta[b]pyran-3-carbonitrile, C18H18N2O5
  22. Crystal structure of 1,2,3-trimethyl-2,3-dihydro-1H-perimidine, C14H16N2
  23. Crystal structure of bis(2,6-dihydroxymethyl)pyridine-κ3N,O,O′)-bis(μ2-6-chloropyridin-2-olato-κ3N,O:O)-bis(6-chloropyridin-2-olato-κO)-bis(nitrato-κ2O,O′)digadolinium(III), C34H30Cl4Gd2N8O14
  24. Crystal structure of 8-isopropyl-8-aza-bicyclo[3.2.1]octan-3-yl 3-hydroxy-2-phenylpropanoate, C19H27NO3
  25. Crystal structure of 1-methyl-3-[((naphthalen-2-ylsulfonyl)oxy)imino]indolin-2-one, C19H14N2O4S
  26. Crystal structure (7,8-bis(diisopropylphosphino)-7,8-dicarba-nido-undecaborane-κ2P,P′)-(benzoato-κ2O,O′)nickel(II), C21H42B9NiO2P2
  27. Crystal structure of methyl-2-methyl-4-(2-oxo-2-phenylethyl)-5-phenyl-1H-pyrrole-3-carboxylate, C21H19NO3
  28. Crystal structure of 2-[(2-oxo-thiazolidine-3-carbonyl)sulfamoyl]-methy-benzoic acid methyl ester, C13H14N2O6S2
  29. Crystal structure of N′-(2-phenylacetyl)thiophene-2-carbohydrazide monohydrate, C13H14N2O3S
  30. Crystal structure of 1,1′-(hexane-1,6-diyl)bis(3-methyl-1H-imidazol-3-ium) bis(hexafluoro phosphate), C14H24F12N4P2
  31. Crystal structure of di-μ-chlorido-bis[1,2-bis(dicyclohexylphosphino)-1,2-dicarba-closo-dodecaborane-κ2P,P′]zinc(II), C52H108B20Cl2P4Zn2
  32. Crystal structure of dibromido-bis[μ-1-[(2-methyl-1H-benzoimidazol-1-yl)methyl]-1H-benzotriazole-κN]mercury(II), C30H26Br2HgN10
  33. Crystal structure of bis(μ-nitrato-κ2O:O)-bis[1,2-bis(diphenylphosphino)-1,2-dicarba-closo-dodecaborane-κ2P,P′]disilver(I) dicloromethane monosolvate, C54H64B20Cl4O6P4Ag2
  34. Crystal structure of dinuclear dichloridobis(dimethylformamide-kO)bis[μ2-3-(2-oxyphenyl)-5-(pyrazin-2-yl)-1,2,4-triazol-1ido-κ4-O,N:N′,N′′(2)]diiron(III) dimethylformamide (1/1), C36H42Cl2Fe2N14O6
  35. Crystal structure of diaqua-dinitrato-κO-bis(4-(1H-pyrazol-3-yl)pyridine-κN)manganese(II), C16H18MnN8O8
  36. Crystal structure of (Z)-6-methoxy-2-(2,2,2-trifluoro-1-hydroxyethylidene)-2,3-dihydro-1H-inden-1-one, C12H6F6O3
  37. Crystal Structure of 4-(2-chloroacetamido)pyridinium chloride monohydrate, C7H10Cl2N2O2
  38. Crystal structure of 2-amino-4-(4-chloro-phenyl)-5-oxo-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile, C16H13ClN2O2
  39. Crystal structure of (E)-1-(2-(thiophen-2-ylmethylene)hydrazinyl)phthalazine hydrochloride–ethanol (1/1), C15H17ClN4OS
  40. Crystal structure of N,N-diethyl-5-bromo-3,4-dihydro-2,4-dioxopyrimidine-1(2H)-carboxamide, C9H12BrN3O3
  41. Crystal structure of 3-(2-(4-chlorophenyl)-3-hydroxy-3,3-diphenylpropyl)-1,1-dimethylurea, C24H25ClN2O2
  42. Crystal structure of 3-(4-chlorophenyl)-1,1-dimethylthiourea, C9H11ClN2S
  43. Crystal structure of 2-amino-4-(4-bromo-phenyl)-7-methyl-5-oxo-4H,5H-pyrano[4,3-b]pyran-3-carbonitrile, C16H11BrN2O3
  44. Crystal structure of 4-(3,4-dimethyl-phenyl)-2-methyl-5-oxo-1,4,5,6,7,8-hexahydro-quinoline-3-carboxylic acid ethyl ester, C21H25NO3
  45. Crystal structure of (E)-2-({4-hydroxy-5-methoxy-3-[(4-methyl-1-piperazinyl)methyl]phenyl} methylidene)-1-indanone, C23H26N2O3
  46. Crystal structure of tripropylammonium 2′-carboxy-[1,1′-biphenyl]-2-carboxylate – [1,1′-biphenyl]-2,2′-dicarboxylic acid (2/1), C60H72N2O12
  47. Crystal structure of catena-poly-{aqua-[μ2-1,2-bis((1H-imidazol-1-yl)methyl)benzene-κ2N:N′]-[μ2-4,4′-(dimethylsilanediyl)dibenzato-κ3O,O′:O′]nickel(II)}, C30H30N4NiO5Si
  48. The crystal structure of 1-(4-bromophenyl)-2-(4-(4-fluorophenyl)piperazin-1-yl)ethanol, C18H20BrFN2O1
  49. Crystal structure of trimethylammonium 4-((4-carboxyphenyl)sulfonyl)benzoate, C17H19NO6S
  50. Crystal structure of syn-2,4-di-o-tolylpentane-2,4-diol, C19H24O2
  51. Crystal structure of 2-[3,5-bis(trifluoromethyl)benzylsulfanyl]-5-(5-bromothiophen-2-yl)-1,3,4-oxadiazole, C15H7BrF6N2OS2
  52. Crystal structure of (E)-3-((naphthalen-1-ylimino)methyl)-4-nitrophenol, C17H12N2O3
  53. Crystal structure of 2-dichloromethyl-2-p-nitrophenyl-1,3-dioxolane, C10H9Cl2NO4
  54. Crystal structure of (1,4,8,11-tetraazacyclotetradecane)palladium(II) tetracyanopalladate(II), C14H24N8Pd2
  55. Crystal structure of 2-(4-oxo-2-thioxothiazolidin-3-yl)acetic acid monohydrate, C5H7NO4S2
  56. Crystal structure of a P4-bridged (η5-pentamethyl-cyclopentadienyl)(η5-adamantylcyclopentadienyl) titanium(III)complex, C50H66P4Ti2
  57. Crystal structure of cis-bis(2,2′-bipyrimidine-κ2N,N′)bis(thiocyanato-κN)nickel(II), C18H12N10NiS2
  58. Crystal structure of cis-bis(2,2′-bipyridine-κ2N,N′)dibromidomanganese(II), C20H16Br2MnN4
  59. Crystal structure of cis-bis(2,2′-bipyridine-κ2N,N′)bis(thiocyanato-κN)nickel(II), C22H16N6NiS2
  60. Crystal structure of trans-dibromido(1,4,8,11-tetraazacyclotetradecane)nickel(II), C10H24Br2N4Ni
  61. Crystal structure of cis-tetrabromidobis(pyridine-κN)platinum(IV), C10H10Br4N2Pt
  62. Crystal structure of (E)-5-((4-chlorophenyl)diazenyl)-2-(5-(4-fluorophenyl)-3-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-1-yl)-4-methylthiazole, C23H17ClFN5S2
  63. The crystal structure of 3-((1R,2S)-1-methylpyrrolidin-1-ium-2-yl)pyridin-1-ium tetrachloridocobaltate(II) monohydrate, C10H18Cl4CoN2O
Heruntergeladen am 19.11.2025 von https://www.degruyterbrill.com/document/doi/10.1515/ncrs-2016-0107/html
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