PREPARATION AND NMR-SPECTRA OF HEXACOORDINATE METAL-COMPLEXES OF MONO(N-ETHYLETHANEDIAMINE) AND MONO(N-BENZLYLETHANEDIAMINE) AND CRYSTAL-STRUCTURE OF [CO(NH3)4(N-BENZYLETHANEDIAMINE)] (NO3)(3)CENTER-DOT-1.5H2O

Mono N-ethylethanediamine and N-benzylethanediamine complexes of Co(II I), Fe(II), and Fe(III) with four cyano or ammine groups were prepared . Their H-1 NMR spectra were measured to determine the conformation of N-ethyl and N-benzyl groups. These N-alkyl groups take pseudo-equator ial orientation at the coordinated secondary amine. The most preferred conformation is that the methyl and phenyl groups are anti with respe ct to the central metal ions. The crystal structure parameters of [Co( NH3)(4)(N-benzylethanediamine)] (NO3)(3).1.5H(2)O were determined: P2( 1), Z = 2, a = 8.639(3), b = 21.240(3), c = 10.897(2) Angstrom, beta = 94.11(1)degrees. The crystallographically independent Co complex cati ons had opposite absolute configuration around coordinated secondary a mine sites and the benzyl groups are anti to the cobalt atom.