C6H6Os(PPri3I2, AgPF6 and an alkyne RCCCO2Me (R = H, Me, CO2Me) gives the complexes [C6H6(PPri3-]PF6 (II–IV). Analogously, the reaction of C6H6OsH-(PPri3I, AgPF6 and HCCCO2Me produces the compound [C6H6(PPri3-]PF6 (V). The X-ray structure analysis of II (R = H) shows that the cation contains a five-membered metalla heterocycle which is obtained by insertion of the alkyne into one of the Os-I bonds
Novel benzeneosmium complexes containing alkynyl, vinyl and vinylidene groups as ligands
作者:Rudolf Weinand、Helmut Werner
DOI:10.1039/c39850001145
日期:——
The complex C6H6Os(CCHPh)(PPri3) has been prepared from [C6H6Osl2]2via alkynyl(iodo)-, vinyl(hydrido)-, and vinyl(halogeno)-osmium compounds as precursors; it reacts with sulphur, selenium, and CuCl by electrophilic addition to the OsC bond.
由[C 6 H 6 Osl 2 ] 2经由炔基(碘)-,乙烯基(氢化)-和乙烯基(卤代)-compounds化合物制备了复合物C 6 H 6 Os(C CHPh)(PPr i 3)作为先驱;它通过亲电加成Os C键与硫,硒和CuCl反应。
Vinyliden Übergangsmetallkomplexe XVI. Synthese und Reaktionen von Alkinyl-, Vinyliden-und Vinyl-Osmium(II)-Komplexen mit [C6H6Os(R3)] als Strukturelement
作者:W. Knaup、H. Werner
DOI:10.1016/0022-328x(91)83051-5
日期:1991.7
The compounds [C6H6Os(PR3)I2] react with AgPF6 and 1-alkynes R′CCH to give, depending on the substituent R′, either neutral alkinyl or cationic vinylidene complexes [C6H6Os(CCR′)(PR3)I] (R′ = Ph, Tol) and [C6H6Os(=C=CHR′)(PR3)I]+ (R′ = H, Me, nBu, tBu), respectively. The reaction of [C6H6Os(PMetBu2)I2] with AgPF6 and HCCCO2Me gives the five-membered ring compound [C6H6(CH=C(I)C(OMe)O)(PMetBu2)]PF6
化合物[C 6 H 6 Os(PR 3)I 2 ]与AgPF 6和1-炔烃R'CCH反应,根据取代基R'得到中性炔基或阳离子亚乙烯基络合物[C 6 H 6 Os(CCR')(PR 3)I](R'= Ph,Tol)和[C 6 H 6 Os(= C = CHR')(PR 3)I] +(R'= H,Me,n Bu,t Bu)。[C 6 H 6 Os(PMe t Bu 2)I 2 ]与AgPF 6和HCCCO的反应2 Me给出五元环化合物[C 6 H 6(CH = C(I)C(OMe)O)(PMe t Bu 2)] PF 6,经NaI处理并随后消除CH 3 I,形成中性络合物[C 6 H 6(CH = C(I)C(O)O)(PMe t Bu 2)]。阳离子[C 6 H 6 Os(= C = CHR')(PR 3)I] +(R'= Me,n Bu,t Bu)与碱(MeNH 2,Me 2 NH,1
Formation of four-membered OsC2P metallaheterocycles via cationic hydrido- and deuterido-methylene intermediates: an unprecedented example of intramolecular CH-activation
作者:Helmut Werner、Karin Roder
DOI:10.1016/s0022-328x(00)99567-6
日期:1986.8
Treatment of the hydrido(methyl)- and deuterido(methyl)-osmium complexes [C6H6OsX(CH3)PPri3] (3, X = H; 3′, X = D) with [CPh3]PF6 gives the metallaheterocycles (fx-1ppcsi)PF6(xf-1ppcsi) (4,4′) probably via cationic OsX(=CH2) and Os(CH2X) species as intermediates, the latter of which activates a CH bond of a methyl group of a Pri substituent to form the four-membered ring. In the presence of CO, the
用[CPh 3 ] PF处理氢化(甲基)-和氘代(甲基)-complex络合物[C 6 H 6 OsX(CH 3)PPr i 3 ](3,X = H; 3 ',X = D)6可能通过阳离子OsX(= CH 2)和Os(CH 2 X)物种作为中间体提供了金属杂环(fx-1ppcsi)PF 6(xf-1ppcsi)(4,4'),后者激活了C的镨甲基的H键我取代基以形成所述四元环。在CO的存在下,配位不饱和中间体[C 6 H 6OsCH 3(PPr i 3)] +可以稳定为羰基(甲基)os阳离子[C 6 H 6 OsCH 3(CO)PPr i 3 ] +。在使4脱质子化时,获得中性络合物[C 6 H 4(CH 3)OsCH 2 CH(CH 3)PPr i 2 ](6)。
Sodium oximates as starting materials for the synthesis of half-sandwich-type arene(oximato) and arene(azavinylidene) osmium complexes
作者:H. Werner、T. Daniel、M. Müller、N. Mahr
DOI:10.1016/0022-328x(95)06010-t
日期:1996.4
The reaction of [C6H6OsI2((PPr3)-Pr-i)] (1) with Na[ON=CR(2)](R(2)=Ph(2), Me(2), C(CH2)(5)) in the presence of KPF6 leads to the formation of the oximato osmium(II) complexes [C6H6Os(eta(2)-ON=CR(2))((PPr3)-Pr-i)]PF6 (6, 7, 8b) in almost quantitative yield. The mesitylene compounds [(mes)Os(eta(2)-ON=CR'R '')(PR(3))]PF6 (9-14) have been prepared similarly using [(mes)OsCl2(PR(3))] (3-5) as starting materials. The synthesis of [C6H6Os(eta(2)-ON=CMe(t)Bu)((PPr3)-Pr-i)]PF6 (17) has been achieved from [C6H6OsCl2((PPr3)-Pr-i)] (16) which in turn is prepared from [C6H6Os(eta(2)-O2C=O)((PPr3)-Pr-i)] (15) and excess Me(3)SiCl. Reaction of 1, [C6H6OsI2(PMe(t)Bu(2))] (2) and 3 (PR(3) = (PPr3)-Pr-i) with Na[ON=CMe(t)Bu] in the presence of KPF6, in methanol as solvent, unexpectedly yields the azavinylidene complexes [(arene)Os(=N=CMe(t)Bu)(PR(3))]PF6 (18b, 19, 20). The X-ray structural analysis of 18b reveals the presence of a nearly linear Os-N-C fragment with an Os-N distance that is in agreement with typical osmium-nitrogen double bond lengths. Related azavinylideneosmium compounds [(arene)Os(=N=CR'R '')(PR(3))]PF6 (21-26) have been obtained on treatment of the corresponding oximato complexes 7, 10 or 14 with either HN=CR'R '' or, for R'=H and R ''=Ph, the trimethylsilyl derivative.