Preparations and structures of some nickel(II) compounds of 2RS,7SR,9SR,14RS- and 2RS,7RS,9SR,14SR-2,5,5,7,9,12,12,14-octamethyl-1,4,8,11-tetraazacyclotetradecane
Keywords: Nickel compound; Cyclic tetraamine; Aza macrocycle; Octamethyl substitution; Isomerism; Crystal structure;