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1、JournalofMolecularStructure988(2011)128–135ContentslistsavailableatScienceDirectJournalofMolecularStructurejournalhomepage:www.elsevier.com/locate/molstrucSynthesis,structures,luminescenceandmagneticpropertiesoftwodinuclearl1,5dicyanamidebridgedcopper(II)complexescontaining
2、atetradentateN-donorSchiffbaseaabcd,⇑KishalayBhar,SomnathChoubey,ParthaMitra,GeorginaRosair,JoanRibas,a,⇑BarindraKumarGhoshaDepartmentofChemistry,TheUniversityofBurdwan,Burdwan713104,IndiabDepartmentofInorganicChemistry,IndianAssociationfortheCultivationofScience,Kolkata700
3、032,IndiacChemistry,SchoolofEngineering&PhysicalSciences,HeriotWattUniversity,EdinburghEH144AS,UKdDepartamentdeQuimicaInorganica,UniversitatdeBarcelona,Diagonal647,08028Barcelona,SpainarticleinfoabstractArticlehistory:Twopentacoordinateddinuclearcopper(II)compoundsofthetype
4、[Cu2(bpbd)2(dca)](ClO4/PF6)3(1/2)Received11July2010[bpbd=N,N0-(bis-(pyridin-2-yl)benzylidene)-1,4-butanediamine;dca=dicyanamide]havebeensynthe-Receivedinrevisedform17December2010sizedandcharacterizedonthebasisofmicroanalytical,spectroscopic,thermalandotherphysicochem-Accept
5、ed17December2010icalresults.SinglecrystalX-raydiffractionmeasurementsof1and2havebeenmadetodefinetheirAvailableonline25December2010coordinationspheresaswellasintermolecularinteractions.Structuralanalysesrevealthat1and2havetwocopper(II)centersboundbyfourNatomsofbpbdandthemetal
6、centersareconnectedbyasingleKeywords:l1,5dcabridge.Boththecopper(II)centersin1havedistortedtrigonalbipyramidalgeometry;whereas,Dinuclearcopper(II)dicyanamidesin2onecopper(II)centerhasadistortedtrigonalbipyramidalgeometryandtheotheradoptsadistortedSchiffbaseX-raystructuresqu
7、arepyramidalenvironment.Inthecrystallinestate,individual0Dunitsin1and2areself-assembled1LuminescencewithCAHpinteractionspromotingdimensionalities.Bothcomplexesshowintraligand(pAp)fluo-AntiferromagnetismrescenceinDMFsolutionsatroomtemperature.Variable-temperature(300–2K)m
8、agneticsusceptibilitystudiesrevealthatlongl1,5dcabridgesmediateveryweakantiferroma
