SOLID-PHASE THERMAL CIS TRANS ISOMERIZATION OF THE BIS(DIAMINE) AND TETRAAZACYCLOALKANE COMPLEXES OF THE TYPE [(CO OR CR)X2((DIAMINE)2 OR (MAC))]+ - ISOMERIZATION OF CIS-[COCL2(CYCLAM)](CL OR BF4) IN THE SOLID-STATE

The solid phase thermal isomerization of cis-[CoCl2(cyclam)] (Cl or BF4) was investigated by means of TG, DTA and DSC methods; cyclam is 1,4,8,11-tetraazacyclotetradecane. The complex was found to isomerize exothermically to the corresponding transform. Details of the isomerization of the complex were discussed along with the results previously obtained for [(Co or Cr)X2{(aa or bb)2, (aa)(bb) or (mac)}]X. nH2O, where X is Cl-, Br-, or BF4-; aa and bb are different diamines selected from 1,2-ethanediamine (en), d,1-1,2-propanediamine (pn), 1,3-propanediamine (tn), d,l-2,3-butanediamine (bn), d,l-1,2-cyclohexanediamine (chxn), or d,1-2,4-pentanediamine (ptn); and mac is cyclam, 1,4,7,11-tetraazacyclotetradecane (isocyclam), 1,4,8,12-tetraazacyclopentadecane ([15]aneN4) or 1,5,9,13-tetraazacyclohexadecane ([16]aneN4).