Mononuclear coordination compounds decompositions

Cobalt(II) alkoxides are known and monomeric forms are part of a wider review.413 The interest in these compounds pertains to a potential role in catalysis. For example, a discrete cobalt(II) alkoxide is believed to form in situ from a chloro precursor during reaction and performs the catalytic role in the decomposition of dialkyl pyrocarbonates to dialkyl carbonates and carbon dioxide.414 A number of mononuclear alkoxide complexes of cobalt(II) have been characterized by crystal structures, as exemplified by [CoCl(OC(t-Bu)3)2 Li(THF)].415 The Co ion in this structure and close relatives has a rare distorted trigonal-planar coordination geometry due to the extreme steric crowding around the metal. 

Stability constant measurements for the aqueous Zn -azide system indicate that four mononuclear complexes of moderate stability are formed, whereas for mercury, maximum coordination of only two azide ligands is observed. Complexation of Cd " in aqueous NOJ-NJ yields the mixed species [Cd(N03)(N3) ] ( = 1-4). Crystallographic structural determinations of A2Zn(Ns)4 (A = K or Cs) have been reported the former exhibits isolated Zn(Ns)4 tetrahedra with linear azide (N—N = 1.18 A). Thermal decomposition of the above compounds yields nitrogen and ZnsN2 as the main products. A new a modification of Zn(Na)2 has been obtained by the use of an ethereal solution of The compounds and ZnLC (M = Zn or Cd X = halide or pseudohalide L =... 

---