简介：Threeheterobinuclearcomplexesweresynthesized,namely[Cu(oxpn)Co(L)2](ClO4)2·xH2O(L=2,2’-bipyridyl(bpy),1,10-phenanthroline(phen),and5-nitro-1,10-phenanthroline(NO2-phen)),whereoxpnrepresentsN,N’-bis(3-aminopropyl)oxam-ido.Basedon1R,elementalanalysis,conductivitymeasurementandelectronicspectra,thesecomplexeswerecharacterizedbyanextendedoxamido-bridgedstructurewithCu(Ⅱ)inaplanarenvironmentandCo(Ⅱ)inaoctahedralenvironment.ThesymmetryofthecationisveryclosetoC2v.Thecomplexeswerealsocharacterizedwithvariabletemperature(4~300K)magneticsusceptibility,andthedatawerefitforthesusceptibilityequationderivedfromspinHamilton,H=-2JS1.S2-DSx12byleastsquarestrategy.Theexchangeintegral,J,wasfoundtobe-22.36cm-1(forbpy);-15.45cm-1(forphen);-19.10cm-1(forNO2-phen),indicatingthatthereisaweakantiferromagneticspin-exchangeinteractionbetweenthemetalions.

简介：Fournewu-oxamidoheterobinuclearcomplexeshavebeensynthesizedandidentifiedas[Cu(oxap)Fe(L)2]SO4,whereoxapdenotestheN,N’-bis(2-aminopropyl)oxamidodianionandLrepresentsdiaminoethane(en);1,3-diaminopropane(pn);1,2-diaminopropane(ap)and2,9-dimethyl-1,10-phenanthroline(Me2-phen).Basedontheelementalanalyses,spectroscopicstudies,magneticmoments(atroomtemperature)andmolarconductivitymeasurements,extendedoxamido-bridgedstructuresconsistingofacopper(Ⅱ)andaniron(Ⅱ)ions,whichhaveasquareplanarenvironmentandanoctahedralenvironment,respectively,areproposedforthesecomplexes.Complexes[Cu(oxap)Fe(en)2]SO4(1)and[Cu(oxap)Fe(pn)2]SO4(2)havebeencharacterizedbyvariabletemperaturemagneticsusceptibility(4.2~300K)andtheobserveddatawereleast-squaresfittedtothesusceptibilityequationderivedfromthespinHamiltonianincludingsingle-ionzero-fieldinteractionfortheiron(Ⅱ)ion,H=-2JS1.S2-DSzl2,givingtheexchangeintegralsJ=-2

简介：Fourμ-oxamidoheterodinuclearcomplexes,[Cu(oxae)Cr(L)2](NO3)3,whereoxaedenotestheN,N’-bis(2-aminoethyl)oxamidodianionandLrepresents1,10-phenanthroline(phen);5-nitro-1,10-phenanthroline(NO2-phen);5-methyl-1,10-phenanthroline(Me-phen)and2,2’-bipyridine(bpy),havebeensynthesizedandcharacterizedbyelementalanalyses,magneticmoments(atroomtemperature)andmolarconductivitymeasurementsandspectroscopy.Itisproposedthatthesecomplexeshaveextendedoxamido-bridgedstructuresconsistingofacopper(Ⅱ)ionandachromium(Ⅲ)ion,whichhaveasquareplanarenvironmentandoctahedralenvironment,respectively.Thecryomagneticpropertiesofthe[Cu(oxae)Cr(bpy)2](NO3)3(1)and[Cu(oxae)Cr(phen)2](NO3)3(2)complexeshavebeenmeasuredovertherangeof4.2-300K.Theleast-squaresfitoftheexperimentaldatabasedonthespinHamiltonian,H=-2JS1·S2,theexchangeintegrals(J)wereevaluatedas+36.9cm-1for1and+35.8cm-1for2.Theresultshaveconfirmed