162967-97-7Relevant academic research and scientific papers
Polyfunctional Ligands: Comparative Oxidative Coupling of - (E = CH, N) with Iodine
Braunstein, Pierre,Hasselbring, Reinhard,Tiripicchio, Antonio,Ugozzoli, Franco
, p. 37 - 38 (1995)
Iodine oxidation of the isoelectronic anions - and - affords the structurally characterized P-P coupling product Ph2P-N=PPh2-PPh2=N-PPh2 and the P-C coupling product (Ph2P)2C=PPh2-CH2-PPh2, respectively; the P-P heterocoupling product
Synthesis and X-ray structures of novel lead(1+) and indium(3+) phosphazenide complexes; Detailed 207Pb-NMR spectra of the 207Pb-Labelled dimeric lead(1+) species
Winkler, Astrid,Bauer, Walter,Heinemann, Frank W.,Garcia-Montalvo, Veronica,Moll, Matthias,Ellermann, Jochen
, p. 437 - 444 (2007/10/03)
The reaction of PbCl2 with LiN(PPh2)2 (1) at -78°C affords the P-P coupled phosphazene Ph2P-N=PPh2-PPh2= N-PPh2 (2) as an oxidation product and, as a reduction equivalent, the novel lead(1+) complex [(Pb1+)2(μ-Ph2P...-N...-PPh2 -)2](Pb-Pb) (3). The crystal structure determination of the red compound 3 shows a Pb-Pb bond length of 304.1(1) pm. The 31P- and 207Pb-NMR spectra of 3 are complicated due to the presence of a higher order spin system (AA′A″A?X for the mono-207Pb isotopomer, AA′A″A?XX′ for the bis-207Pb isotopomer). Simulations of the 31P and 207Pb spectra both on material with natural isotope abundance and on the 207Pb-labelled compound (3*) reveal a large Pb,Pb coupling constant of 7708 Hz, indicative of a covalent Pb-Pb bond. - Though InCl3 is diagonally related to PbCl2, no significant redox process is observed in the reaction between InCl3 and 1. The yellow crystals of [In3+(Ph2P...-N...-PPh2-)3] (4) that are obtained were also investigated by X-ray analysis. These show a propeller-like configuration of the three four-membered chelate rings with indium(3+) as the centre.
