Transition Metal Chemistry of Main Group Hydrazides. 17. Triphosphine derived from phosphanyl hydrazide as a building block for hetero trimetallic compounds. Synthesis and coordination chemistry of ((Me2P)2N?N(Me)(PMe2)) |
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Authors: | V Sreenivasa Reddy Kattesh V Katti |
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Abstract: | The new triphosphine (Me2P)2N? N(Me)(PMe2) ( 1 ), has been synthesized in pure form by the reaction of methylhydrazine with dimethylchlorophosphine in the presence of triethylamine. This triphosphine represents a bridge between phosphinoamine (>P? N(R)? P<) and phosphanyl hydrazide (>P? N(R)? N(R)? P<) backbones. Reaction of 1 with cis-W(CO)4(NHC5H10)2] proceeds via two coordination modes to give four-membered M? P? N? P and five-membered M? P? N? N? P metallacyclic frameworks. The tungsten complex cis-W(CO)4{(Me2P)2NN(Me)(PMe2)}] ( 2 ) possessing an uncoordinated phosphine moiety to prepare multimetallic organometallic compounds. For example, reactions of 2 with PdCl2(PhCN)2 and PtCl2(COD) produced the trimetallic complexes consisting of W(0)? Pt(II) and W(0)? Pd(II) centers respectively in good yields. The different isomers of these trinuclear complexes have been clearly identified by 31P NMR spectroscopy. |
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Keywords: | Phosphanyl Hydrazide Phosphinoamine Triphosphine Trimetallic Complexes |
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