83571-85-1Relevant academic research and scientific papers
(μ-Methylene)diplatinum complexes: Their syntheses, structures, and properties
Azam, Kazi A.,Frew, Aileen A.,Lloyd, Brian R.,Manojlovic-Muir, Ljubica,Muir, Kenneth W.,Puddephatt, Richard J.
, p. 1400 - 1406 (2008/10/08)
Reaction of [Pt2HL(μ-dppm)2][PF6], 1, dppm = Ph2PCH2PPh2, with excess CH2N2 gives [Pt2Me(μ-CH2)L(μ-dppm)2][PF6], 2a, L = CO, or 2b, L = PMe2Ph, but gives [Pt2Me(μ-CH2)(CH2PPh 3)(μ-dppm)2][PF6], 4. when L = PPh3, and this reacts slowly with CH2Cl2 to give [Pt2Cl(μ-CH2)(CH2PPh 3)(μ-dppm)2][PF6], 5. The crystal and molecular structures of [Pt2Cl2(μ-CH2)(μ-dppm)2], 6, and [Pt2Cl(CH2PPh3)(μ-CH 2)-(μ-dppm)2][PF6], 5, have been determined by X-ray analysis. 6 is tetragonal of space group P43212, Z = 4, with a = 15.096 (5) A? and c = 26.349 (4) A?. The structure is based on 2238 intensities and refined to R = 0.060. 5 is monoclinic of space group P21/c, Z = 4, with a = 13.199 (2) A?, b = 17.866 (6) A?, c = 30.044 (4) A?, and β = 91.20 (3)°. R is 0.074 for 6552 reflections. The structural results indicate that both complexes are A-frames, with CH22- and a pair of dppm ligands linking the two d8 Pt(II) centers. The Pt?Pt distances, 3.151 (1) A? in 6 and 3.120 (2) A? in 5, are too long to indicate direct metal-metal bonding. The Pt-C-Pt angles are 103.4 (7)° and 94.1 (10)° in 6 and 5, respectively. Pyrolysis of 2a gave CH4 and CO, and reaction of 2a with NaBH4 or MeLi gave [Pt2(μ-H)Me2(μ-dppm)2] [PF6] or cis-[Pt2Me4(μ-dppm)2], respectively.
Multiple Methylene Insertion Reactions: the Crystal Structure of a Complex formed by Insertion of Methylene into a Pt-P Bond
Azam, Kazi A.,Frew, Aileen A.,Lloyd, Brian R.,Manojlovic-Muir, Ljubica,Muir, Kenneth W.,Puddephatt, Richard J.
, p. 614 - 616 (2007/10/02)
Up to three methylene groups from diazomethane may be incorporated into hydridodiplatinum(I) complexes by insertion into Pt-Pt, Pt-H and,in one case, a Pt-P bond; X-ray structure determination establishes the existence of an ylide-(μ-methylene) complex of platinum, and the first details of the geometry of an M2(μ-CH2) group with no M-M bond are reported.
