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1、SynthesisandCrystalStructureof（L）2W（CO）4·CH3COCH3（L=1-Phenacylimidazole）25卷6期2006.6结构化学(MEGOUHUAXUE)Chinese1.Struct.Chem.,,01.25.No.6663-666SynthesisandCrystalStructureof(L)2W(CO)4?CH3COCH3(L1-Phenacylimidazole)①GANXian—XueZHAOXue.MeibSONGHai—BinbWANGJi—TaoTAN
2、GLiang—Fub@(DepartmentofChemistryandChemicalEngineering,YibinUniversity,Yibin644007,China)(DepartmentofChemistry,StateKeyLaboratoryofElemento.OrganicChemistry,NankaiUniversity,Tianjin300071,China)ABSTRACTThereactionof1-phenacylimidazolewithW(CO)6ina1:1molarrat
3、iounderirra—diationwithahigh—pressureHglampmainlyyieldedthetitlecompound(C29H26N4O7W'Mr=726.39),whichisofortho~ombic,spacegroupPbcawitha=27.665(4),b=7.7807(12),c=27.803(4)A,V=5984.8(16)A,z=8,D=1.612g/cm,2(MoKa)=0.71073A,3.911mm-',F(000)=2864,R=0.0583andwR=0.15
4、02for3356observedreflections(,>2a(,)).Thec~smlstructuralanalysisindicatesthatinthecoordinationgeometryoftungsten,l—phenacylimidazoleactsasamonodentateligandandtwoimidazoleligandslocateinacis—position.Keywords:imidazole,tungstencarbonyl,X?raystructurelINTRoD
5、UCTIoNDuetotheirvariabilityinbindingmodes,five—memberedheterocyclicligandssuchaspyrazole【l】and1.2,4-triazole[】havebeendrawnmuchattentiOn.Consequently,therearenumerousreportsontheirderivatives.Imidazolesresemblepyrazoles,andtheyareisomericfive—memberedheterocyc
6、licmoleculescontainingtwonitrogenatoms.Furthermore,imida-zoleisalsoaringcomponentofadenineandpurine,oneofthemostversatilebindingsitesinbiologicalsystems,sothereisasignificantamountofinvesti—gationofimidazolederivativesreportedinthelitera-tures【3'引.Althoughgrou
7、p6metalcarbonylcomple.xeswithimidazolegrouphavealsobeensynthesizedandcharacterized,.reiaortsontheirc~stalstruc.turesarestillrare.Inrecentyears,wehavebeenin—terestedinutilizingnitrogen-containingaromaticheterocyclicligands,especiallyfive—memberedhete—rocyclicpy
8、razoleaswellas1,2,4-triazole,topreparenovelmain?-groupandtransitionmetalcomple?-xes['~9】.Nowwecontinueourinvestigationoftransi.tionmetalcomplexescontainingaromaticheterocyc—licliga
