26681-88-9Relevant articles and documents
New superhindered polydentate polyphosphine ligands P(CH2CH 2PtBu2)3, PhP(CH2CH 2PtBu2)2, P(CH2CH 2CH2PtBu2)3, and their ruthenium(II) chloride complexes
Gilbert-Wilson, Ryan,Field, Leslie D.,Bhadbhade, Mohan M.
experimental part, p. 3239 - 3246 (2012/04/10)
The synthesis and characterization of the extremely hindered phosphine ligands, P(CH2CH2PtBu2)3 (P2P3tBu, 1), PhP(CH2CH 2PtBu2)2 (PhP2P 2tBu, 2), and P(CH2CH2CH 2PtBu2)3 (P3P 3tBu, 3) are reported, along with the synthesis and characterization of ruthenium chloro complexes RuCl2(P 2P3tBu) (4), RuCl2(PhP 2P2tBu) (5), and RuCl2(P 3P3tBu) (6). The bulky P2P 3tBu (1) and P3P3tBu (3) ligands are the most sterically encumbered PP3-type ligands so far synthesized, and in all cases, only three phosphorus donors are able to bind to the metal center. Complexes RuCl2(PhP2P2 tBu) (5) and RuCl2(P3P3 tBu) (6) were characterized by crystallography. Low temperature solution and solid state 31P{1H} NMR were used to demonstrate that the structure of RuCl2(P2P 3tBu) (4) is probably analogous to that of RuCl 2(PhP2P2tBu) (5) which had been structurally characterized.