Synthesis and structure of bis(phosphaallyl) complexes with two-co-ordinate phosphorus

Organo-aluminum, zinc and magnesium derivatives of the imidotris(amido)phosphate Me3SiNP(NHtBu)3

“…The Zn-N t Bu bond length of 1.944(2) Å is substantially shorter than the bond between the positive zinc centre and the NSiMe 3 group (2.102(2) Å ), suggesting that the negative charge resides primarily on the N t Bu nitrogen atom. These metal-nitrogen bonds are similar in length to those observed in other PN 2 Zn ring-containing complexes [17][18][19]. The disparity of ca.…”

Ring Opening of Dilithio Bis(amido)cyclodiphosphazanes As a Route to 1,3-Diaza-2λ2-phosphaallyl Gallium Complexes

“…The heteroallyllic ligand must have been derived from the cycloreversion (ring opening) of a dilithio bis(amido)cyclodiphosphazane. Although this reaction has been reported once before, it has never been observed for cyclodiphosphazanes bearing the comparatively small tert -butyl substituents, nor for bis(amido)cyclodiphosphazane cage complexes.…”

“…The 31 P NMR spectrum was more informative, however, because it showed two singlets at 373.5 and 160.1 δ, respectively, in a 1:2 intensity ratio. Signals between 340 and 380 δ are highly diagnostic for 1,3-diaza-2-phosphaallyls, and the NMR data thus suggested that the yellow complex 2 contained a diazaphosphaallyl species, in addition to a conventional bis(amido)cyclodiphosphazane ligand. Although the presence of a diazaphosphaallyl ligand seemed certain, it was uncertain whether it was formed from the breakup of coordinated bis(amido)cyclodiphosphazane or from excess dilithio bis( tert -butylamido)cyclodiphosphazane.…”

On the equilibrium between monomeric and dimeric iminochlorophosphanes R–N=P–Cl

“…Subsequently the monomer-dimer equilibrium (Scheme 2) between the iminochlorophosphane and the cyclo-1,3-diphospha(III)-2,4-diazane depending on the organic group R, the solvent and the state of aggregation has been addressed in a series of articles [10][11][12][13][14][15][16][17][18][19]. For example, Burford et al assumed that dependent upon steric strain in derivatives of [RPNR] 2 the dimer can be destabilized with respect to the monomer [15][16][17][18][19].…”