Pincer Phosphine Complexes of Ruthenium: Formation of Ru(P−O−P)(PPh<sub>3</sub>)HCl (P−O−P = xantphos, DPEphos, (Ph<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>)<sub>2</sub>O) and Ru(dppf)(PPh<sub>3</sub>)HCl and Characterization of Cationic Dioxygen, Dihydrogen, Dinitrogen, and Arene Coordinated Phosphine Products
作者:Araminta E. W. Ledger、Aitor Moreno、Charles E. Ellul、Mary F. Mahon、Paul S. Pregosin、Michael K. Whittlesey、Jonathan M. J. Williams
DOI:10.1021/ic100438d
日期:2010.8.16
1′-bis(diphenylphosphino)ferrocene (dppf) to give the 16-electron complex Ru(dppf)(PPh3)HCl (1d), which upon treatment with NaBAr4F, affords [Ru(dppf)(η6-C6H5)PPh2}H]BAr4F (8), in which the PPh3 ligand binds η6 through one of the PPh3 phenyl rings. Reaction of 8 with CO or PMe3 at elevated temperatures yields the 18-electron products [Ru(dppf)(PPh3)(CO)2H]BArF4 (9) and [Ru(PMe3)5H]BAr4F (10).
dibenzylideneacetone) and monophosphanes in a 1:1:2 molar ratio to give the corresponding Pd monophosphane fullerene derivatives [Pd(η2-C60)L2] [L = P(2-Fu)3 (Fu = furyl) 1; L = P(2-Fu)Ph22; L = PPh2H 3; L = P(Fc)Ph2 (Fc = ferrocenyl) 4; L = P(Fc)2Ph 5], whereas reaction with M(dba)2 (M = Pd, Pt) and subsequent treatment with diphosphanes in 1:1:1 molar ratio afforded the corresponding Pd/Pt diphosphane fullerene
Synthesis of α,ω-bis(diphenylphosphino)alkane and α,ω-bis(diphenylphosphino)(poly)ether ligands and complexes of rhodium(I)
作者:D.Harry M.W. Thewissen、Klaas Timmer、Jan G. Noltes、Jan W. Marsman、Richard M. Laine
DOI:10.1016/s0020-1693(00)86576-7
日期:1985.2
α,ω-Bis(diphenylphosphino)alkane and α,ω-bis(diphenylphosphino)(poly)ether ligands can be prepared in very high yields via reaction of the appropriate dihalide with two equivalents of LiPPh2. For the [Rh(COD)(P P)][ClO4] complexes of these ligands, the P P ligands with five or less atoms in the alkane or ether bridge form monomeric complexes via η2-coordination. In general the ligands with eight or
Radioactive transition metal nitride heterocomplex
申请人:——
公开号:US20020048549A1
公开(公告)日:2002-04-25
The present invention provides a single radioactive transition metal nitride heterocomplex which permits labeling of a physiologically active substance such as a peptide, hormone or the like without impairing the activity of the substance. The radioactive transition metal nitride heterocomplex of the present invention is represented by the following formula (I):
(M═N)XY (I)
wherein a radioactive transition metal M is radioactive technetium or radioactive rhenium, N is a nitrogen atom, X is a diphosphine compound or a diarsine compound, and Y is a bindentate ligand having a combination of electron-donating atoms.
Selective Semihydrogenation of Polarized Alkynes by a Gold Hydride Nanocluster
作者:Jia Dong、Jerome R. Robinson、Ze-Hua Gao、Lai-Sheng Wang
DOI:10.1021/jacs.2c05046
日期:2022.7.13
containing electron-withdrawing groups, forming key gold-alkenyl semihydrogenation intermediates, which can be efficiently and selectively converted to Z-alkenes under acidic conditions. All key reaction intermediates are isolated and characterized, providing atomic-level insights into the active sites and mechanisms of semihydrogenation reactions catalyzed by gold-based nanomaterials. The hydridic hydrogen
长期以来,纳米金催化剂中的氢化氢一直被认为是加氢反应中的重要中间体,但尚未被直接观察到。在这里,我们报告了具有二齿膦配体的新十一金簇的合成。双齿配体的螯合作用导致更对称的 Au 11核心与两个不稳定的 Cl -可与 BH 4交换的配体-产生新的十一金氢化物簇。发现新的氢化物簇很容易与含有吸电子基团的炔烃发生加氢反应,形成关键的金-烯基半氢化中间体,可以有效和选择性地转化为Z-烯烃在酸性条件下。所有关键的反应中间体都被分离和表征,为金基纳米材料催化的半氢化反应的活性位点和机制提供了原子级的见解。发现十一金簇中的氢化氢是防止烯烃过度氢化成烷烃的关键。目前的研究为基于金的纳米材料实现的氢化化学提供了基本见解,并可能导致开发用于炔烃选择性半氢化或官能化的高效催化剂。