The interaction of nickel(II) and copper(II) schiff base complexes with diorganotin(IV) dichlorides in acetonitrile: A thermodynamic study

摘要

Adduct formation of nickel(II) and copper(II) Schiff base complexes, (NiL) and (CuL), as donors with diorganotin(IV) dichlorides as acceptors has been investigated spectrophotometrically, in acetonitrile. L is a,a'-Me _2-salen, N,N'-ethylenebis(a-methylsalicylideneiminate) (1), a,a'-Me _2- salpn, N,N'-1,2-propylenebis(a-methylsalicylideneiminate) (2), a,a'-Ph _2-salen, N,N'-ethylenebis(a-phenylsalicylideneiminate) (3), and a,a'-Ph _2-salpn, N,N'-1,2-propylenebis(a- phenylsalicylideneiminate) (4). The trend of adduct formation of the nickel(II) and copper(II) Schiff base complexes with a given tin compound decreases as follows: M(a,a'-Me _2-salen) > M(a,a'-Me _2-salpn) > M(a,a'-Ph _2-salen) > M(a,a'-Ph _2-salpn). The trend of the reaction of R _2SnCl _2 toward a given nickel(II) or copper(II) Schiff base complex is Ph > Me > Bu. The trend of the metal reactivity in a given Schiff base toward a given diorganotin(IV)dichloride at the same temperature is Cu(II) > Ni(II).