P nuclear magnetic resonance study of the interaction of multidentate amines with zinc(II) bis(O,O′-di-iso-butyldithiophosphate) |
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| Authors: | Philip G Harrison Paul Brown James McManus |
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| Abstract: | 31P NMR has been employed to study the interaction between zinc(II) bis(O,O′-di-iso-butyldithiophosphate), ZnS2P(OiBu)2]2, and four multidentate amines (diethylenetriamine, triethylenetetramine, tetraethylenepentamine and pentaethylenehexamine) in chloroform at 294 K. The major interaction of ZnS2P(OiBu)2]2 and these polyamines involves displacement of the {S2P(OiBu)2} ligands from the zinc giving Zn(amine)]2+ and S2P(OiBu)2]− ions in solution. The magnitudes of the equilibrium constants, K1 (={Zn(amine)}2+]{DDP}−]2/Zn(DDP)2]amine]), have been evaluated in the cases of triethylenetetramine (20.0 l mol−1), tetraethylenepentamine (19.1 l mol−1) and pentaethylenehexamine (1.58 l mol−1). Crystalline 1:1 ionic complexes have also been isolated from these systems and characterised. |
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