83466-54-0Relevant articles and documents
Platinum(II) complexes of some unsymmetrical diphosphenes
Dillon, Keith B.,Fox, Mark A.,Gibson, Vernon C.,Goodwin, Helen P.,Sequeira, Leila J.
, p. 113 - 119 (2017/02/05)
Reaction of the unsymmetrical diphosphene Ar*P=PArF1 (Ar*?=?2,4,6-tBu3C6H2, ArF?=?2,4,6-(CF3)3C6H2) with the dimeric platinum(II) species trans-[Pt(PEt3)Cl(μ-Cl]2led initially to the formation of two different monomeric Pt(II) complexes trans-[Pt(PEt3)Cl2(Ar*P=PArF)] 2 and trans-[Pt(PEt3)Cl2(ArFP=PAr*)] 3, where the underlined phosphorus atom coordinates to Pt. These were readily identifiable by31P NMR solution-state spectroscopy, but attempts to separate them by column chromatography were unsuccessful. When the reaction was repeated on a larger scale, a third complex cis-[Pt(PEt3)Cl2(ArFP=PAr*)] 4 was detected in solution, with P-ArFbound to Pt. Calculations of energies and31P NMR chemical shifts confirm that this species is expected to be the thermodynamically most stable monomeric reaction product. For comparison, we have also prepared the analogous Pt(II) complex trans-[Pt(PEt3)Cl2(Ar*P=PAr*)] 6 of the symmetrical diphosphene Ar*P=PAr* 5, and obtained its31P NMR parameters in solution. The mixed diphosphene Ar′P=PArF7 (Ar′?=?2,6-(CF3)2C6H3) reacts with the same platinum(II) dimer to yield a single cis-complex 8. Calculations have enabled us to assign the31P chemical shifts of this unsymmetrical diphosphene 7, and to show that the Ar′ group is coordinated to Pt in the unique product cis-[Pt(PEt3)Cl2(Ar′P=PArF)] 8.
Synthesis and redox properties of a diphosphene carrying a redox-active sterically protecting group
Tsuji, Kyoko,Sasaki, Shigeru,Yoshifuji, Masaaki
, p. 3203 - 3206 (2007/10/03)
The 2,6-dimesityl-4-[bis(4-methoxyphenyl)amino]phenyl group was developed as a sterically protecting group carrying a reversible redox site at the 4-position and was applied to the construction of a novel redox system composed of the diphosphene and triarylamine units.
Transition-metal Catalysed Metathesis of Phosphorus-Phosphorus Double Bonds
Dillon, Keith B.,Gibson, Vernon C.,Sequeira, Leela J.
, p. 2429 - 2430 (2007/10/03)
W(PMe3)6 is an efficient chloride ion abstracting reagent for the synthesis of RP=PR species from RPCl2 precursors; moreover, the W(PMe3)6-RPCl2 solutions catalyse the exchange of the diphosphene PR end-groups via a mechanism closely related to the olefin metathesis process.