Synthesis and coordination chemistry of neutral phospha(III)guanidines. Formation of 1-aza-3-phospha-4-metallacyclobut-1-ene rings at group 6 metals
作者： Joanna Grundy , Martyn P. Coles , Peter B. Hitchcock
DOI: 10.1039/B302554C
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摘要: The neutral phospha(III)guanidine compounds, Ph2PC{NR}{NHR} (1a, R = Cy; 1b, = iPr), are reported. NMR spectroscopic data indicated the presence of Esyn isomer in solution and structural studies confirmed this solid-state. Reaction 1a with M(CO)4(pip)2 [M Mo, W; pip piperidine] proceeded via displacement piperidine ligands to generate complexes M[Ph2PC{NCy}{NHCy}](CO)4 (2a, M Mo; 3a, W). X-ray structure 2a 3a were solved, showing first structurally characterised examples 1-aza-3-phospha-4-metallacyclobut-1-ene rings.
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