Organocadmium Hydrazide and Hydrazine Complexes

The first structurally authenticated organocadmium hydrazine and hydrazide complexes are reported. Reaction of CdMe2 with H2NN(CH2)(4)O in a 1:1 ratio forms the adduct [(Me2Cd)(3)(H2NN(CH2)(4)O)(2)](infinity) (1) below room temperature. Heating the same solution to 90 degrees C liberates methane and generates [MeCdN(H)N(CH2)(4)O](4) (2). The structure of I consists of dimers, [Me2Cd center dot H2NN(CH2)(4)O](2), which form six-membered Cd2N4 rings, linked into 1-D chains by CdMe2 moieties coordinated to the oxygen of the morpholine ring. 2 is a tetramer embodying a Cd4N8 cage analogous to related organozinc hydrazides, but unlike the latter, each metal center has the same coordination environment. Hydrolysis of 2 gives [MeCdN(H)N(CH2)(4)O](3)[MeCdOH] (3), which is isostructural with its known zinc analogue. In addition to X-ray crystallography, 1 and 2 have been characterized by H-1, C-13, and Cd-113 NMR.