五配位单核钴配合物的单晶结构和磁性能

摘要

制备了五配位单核钴配合物[Co(TMC)Cl]ClO4(1,TMC=1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecane).配合物1结晶于单斜晶系:P21,晶胞参数为a=0.805 95(7) nm,b=1.486 58(12) nm,c=0.813 64(7) nm,β=110.190(2)°,V=0.914 93(13) nm3,Z=2,T=120(2)K.钴与来自TMC配体的4个氮原子和1个氯离子配位,形成了扭曲的四方锥配位构型.磁性测试揭示了高自旋的钴离子具有场诱导的慢弛豫行为.%A pentacoordinate mononuclear cobalt(Ⅱ) complex,[Co(TMC)Cl]ClO4 (1,TMC=1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecane),is synthesized.It crystallizes in the monoclinic P21 with a=0.805 95(7) nm,b=1.486 58(12) nm,c=0.813 64(7) nm,β=110.190(2)°,V=0.914 93(13) nm3,Z=2,T=120(2) K.The Co(Ⅱ) ion is coordinated to four N atoms from the TMC ligand and one Cl-ion.The geometry of cobalt atom is best described as a distorted square pyramid.The magnetic measurements reveal the field induced slow relaxation behavior for the high-spin Co(Ⅱ) ion.CCDC:1849513.