Structural studies on co-ordinated macrocyclic ligands. Part I. Crystal and molecular structure of [(1RS,3SR,8RS,10SR)-3,5,7,7,10,12,-14,14-octamethyl-1,4,8,11-tetra-azacyclotetradeca-4,11-diene]nickel(II) perchlorate

Abstract

The X-ray structural analysis of the title compound has been determined from diffractometer data and refined by least-squares to R 0·08 for 2211 independent reflexions. Crystals are monoclinic, space-group P2₁/c, a= 16·401(4), b= 10·856(6), c= 15·072(4)Å,β= 91·07(3)°, Z= 4. In the complex cation the two secondary amine and two imino-donor groups are in trans planar co-ordination. The two asymmetric carbon centres and the two asymmetric nitrogen centres occur in racemic pairs, the configuration of the racemate being (1RS, 3SR, 8RS, 10SR).