Novel p-cymene-osmium(<scp>II</scp>) and -osmium(0) complexes: a ring ligand determining inter-vs. intra-molecular C–H addition
作者:Helmut Werner、Karin Zenkert
DOI:10.1039/c39850001607
日期:——
The osmium(0) complex [(pc)Os(C2H4)PMe3][pc =η6-p-cymene (4-isoproltoluene)](7) has been prepared together with a group of neutral and cationic p-cymemeosmium(II) compounds; in contrast to [C6H6Os(C2H4)PMe3], the corresponding p-cymene complex (7) reacts with an excess of PM3 in benzene not by intra- but by inter-molecular C–Haddition to form [OsH(C6H5)(PMe3)4].
锇(0)配合物[(PC)锇(C 2 H ^ 4)PME 3 ] [PC =η 6 - p -cymene(4- isoproltoluene)](7)已经被与一组中性和阳离子的制备一起p -cymemeosmium(II)化合物;与[C 6 H 6 Os(C 2 H 4)PMe 3 ]相比,相应的对-Cymene配合物(7)与苯中过量的PM 3反应不是通过分子内而是通过分子间C–H加成形成[OsH(C 6 H 5)(PMe 3)4 ]。
Mononuclear η<sup>6</sup>-p-cymeneosmium(<scp>II</scp>) complexes and their reactions with Al<sub>2</sub>Me<sub>6</sub>and other methylating reagents
作者:Javier A. Cabeza、Peter M. Maitlis
DOI:10.1039/dt9850000573
日期:——
187Os, 31P and 17O NMR study of carbonylated and alkylated (p-cymene)OsI (L)PR3 complexes
作者:Andreas Gisler、Martina Schaade、Eric J.M. Meier、Anthony Linden、Wolfgang von Philipsborn
DOI:10.1016/s0022-328x(97)00376-8
日期:1997.1
Series of complexes of the types [(p-cymene)OsI(CO)PR3][PF6], (p-cymene)OsI(phenylethynyl)PR3, (p-cymene)OsI(alkyl)PR3 have been prepared and investigated by Os-187, P-31 and O-17 NMR spectroscopy. The structures of (p-cymene)OsI(C=CPh)PMe3 (3a) and (p-cymene)OsI(C=CPh)(PPr3)-Pr-i (3c) have been determined by X-ray diffraction. A mechanistic study of the formation of the metallacycle 8A formed by intramolecular trans-alkylation from (p-cymene)(OsI2PPr3)-Pr-i (1c) in the presence of Al2Me6 is presented. As shown by time-dependent P-31 NMR, (p-cymene)OsI(Me)(PPr3)-Pr-i (6c) is formed as an intermediate. Os-187, C-13 coupling constants in Cp-and Cp*Os(CO)(2)Me (14 and 15) have been determined from C-13-filtered (H-1, Os-187)-HMQC correlation spectra and are interpreted in comparison with the Fe-57, C-13 data of the corresponding iron complexes. (C) 1997 Elsevier Science S.A.