CH 2 C 5 H 5单元悬挂的环戊二烯基铑(I)化合物的制备及其用作合成异双金属RhTi和RhZr配合物的原料
摘要:
一般组合物[(η的串联cyclopentadienylrhodium的(I)配合物5 -C 5 H ^ 4 CH 2 C ^ 5 ħ 5)的Rh(L)(L')](L = L'= C 2 H ^ 4,C 8 ħ 14:L = P我镨3,L'= C 2 H ^ 4,器CPh 2,CCCPh 2 ; L =锑我镨3,L'=器CPh 2)配有一个悬挂CH 2 C ^ 5 ħ 5由相应的铑(I)前体和THF中的NaC 5 H 4 CH 2 C 5 H 5制备了π键五元环上的单元。化合物[(η 5 -C 5 H ^ 4森达2 ç 5 ħ 5)的Rh(PhC≡CPh)(P我镨3)]也同样地求出的特征在于单晶X射线衍射分析。[(η的去质子化5 -C 5 H ^ 4 CH 2 C ^ 5 ħ 5)的Rh(L)2 ]和[(η5 -C 5 H ^ 4 CH 2 C ^ 5 ħ 5)的Rh(L)(L')]与任
DOI:
10.1016/s0022-328x(03)00532-1
作为产物:
描述:
trans-[RhCl(=CPh2)(Sb(i-Pr)3)2] 、 三异丙基膦 以
not given 为溶剂,
以98%的产率得到trans-chlorobis(triisopropylphosphine)diphenylcarbenerhodium(I)
参考文献:
名称:
旨在制备碳单鎓(I)配合物的研究中的成功与偶然性
摘要:
将描述一系列新的正方形平面和半三明治型碳鎓(I)配合物的制备。成功的关键是使用双(二b)铑化合物反式-[RhCl(C 2 H 4)(Sb i Pr 3)2 ]作为起始原料,从该化合物逐步地以反式-[RhCl(= CRR')(Sb i Pr 3)2 ](L = P i Pr 3,As i Pr 3,SbEt 3)和[C 5 H 5 Rh(= CCR')L](L = Sb i Pr如图3所示,已经获得了P i Pr 3,PMe 3,CO,CN t Bu)。反式-[RhCl(= CPH 2)L 2 ] L = Sb i Pr 3,P i Pr 3或[C 5 H 5 Rh(= CPh 2)(P i Pr 3)]中卡宾配体的位移为CO或CN t Bu导致形成相应的羰基或异氰基铑化合物,并且CC耦合产物Ph 2 C = C = O和Ph 2 C = C = N t卜分别。卡宾配体还参与在反式-[RhCl(=
Carbenerhodium(I) complexes of the half-sandwich-type: reactions with electrophiles
作者:Elke Bleuel、Peter Schwab、Matthias Laubender、Helmut Werner
DOI:10.1039/b008354m
日期:——
intermediate. The triphenylphosphine complex [η5-C5H4(CHPh2)}RhCl2(PPh3)] 7f was prepared analogously from 5c and two equiv. of HCl. The reactions of 5a and 5d (R = Ph, L = SbPri3) with either HBF4, [Me3O]BF4 or methyl triflate give via attack of the electrophile on the carbene carbon atom and subsequent σ/π rearrangement cationic η3-benzylrhodium(III) complexes 9 and 10a–c in good to excellent yields
所述carbenerhodium的反应(我)配合物[(η 5 -C 5 H ^ 5)的Rh(CR 2)(L)](R = 芳基)(以HX(X = Cl,CF 3 CO 2)为主导),具体取决于配体L,要两种不同类型的产品。而化合物1,2与R = P h和L = CO或PME 3与HX进行反应,得到铑(III)烷基[(η 5 -C 5 H ^ 5)RHX(CHPh配合2)(L)] 3,4A,4B中,类似物图5a和5b中,其中R = PH,p -Tol和L = PPR我3得到处理后与HX(X =氯,溴,I,CF 3 CO 2)的环-取代的产物[η 5 -C 5高4(CHR 2)} RhHX(PPr i 3)] 6a–e。在过量HX的存在,后者被转化成卤代或二(trifluoroacetato)衍生物[η 5 -C 5 H ^ 4(CHR 2)} RHX 2(PPR我3)]器7a-e 。一种贴标试验使用[(η
PX3-induced migratory insertion reactions of half-sandwich-type carbenerhodium(I) complexes
作者:Ulrich Herber、Rita Guerrero Sanchez、Olaf Gevert、Matthias Laubender、Helmut Werner
DOI:10.1039/b008601k
日期:——
Pri3)] (X = F, 6a; OPh, 6b). The molecular structures of 6a and 6b have been determined by X-ray crystallography. The reaction of the stibine complex [(η5-C5H5)Rh(CPh2)(SbPri3)], 2b, with PF3 proceeds by ligand displacement to afford the newcarbenerhodium(I) compound [(η5-C5H5)Rh(CPh2)(PF3)], 7. The mechanism of the migratory insertion reaction is discussed.
Synthesis, Molecular Structure, and Reactivity of Indenylrhodium Complexes Containing Diphenylcarbene as Ligand
作者:Elke Bleuel、Olaf Gevert、Matthias Laubender、Helmut Werner
DOI:10.1021/om000188v
日期:2000.8.1
(η5-Indenyl)rhodium(I) complexes of the general composition [(η5-C9H7)Rh(CPh2)(L)] (L = SbiPr3 (6), PiPr3 (7), PPh3 (8), PiPrPh2 (9), PiPr2Ph (10)) were prepared from the square-planar precursors trans-[RhCl(CPh2)(L)2] (1−5) and C9H7K in THF. Treatment of 6−10 with carbon monoxide resulted in an unusual migratory insertion of the carbene ligand into one of the C−H bonds of the five-membered ring of
作者:Schwab, Peter、Mahr, Norbert、Wolf, Justin、Werner, Helmut
DOI:——
日期:——
Synthesis and molecular structure of four-coordinate neutral and cationic diphenylcarbenerhodium(I) complexes
作者:Elke Bleuel、Birgit Weberndörfer、Helmut Werner
DOI:10.1016/s0022-328x(00)00716-6
日期:2001.1
Neutral diphenylcarbenerhodium(I) complexes of the general composition trans-[RhX(=CPh2)((PPr3)-Pr-t)(2)] (X = F (3), OCN (4), CF3CO2 (5), PhCO2 (6), CF3SO3 (7)) were prepared from the chloro or bromo precursors trans-[RhCl(=CPh2)((PPr3)-Pr-i)(2)] (1) and trans-[RhBr(=CPh2)((PPr3)-Pr-i)(2)] (2) by salt metathesis in acetone and isolated in excellent yields. While treatment of 1 with Tl(acac[F-6]) afforded the substitution product trans-[Rh(kappa (1)-acac[F-6])(=CPh2)((PPr3)-Pr-i)(2)] (8), the corresponding reaction of 1 with Tl(acac) gave the chelate compound [Rh(kappa (2)-acac)(=CPh2)((PPr3)-Pr-i)] (9) with only one phosphine ligand attached to the metal center. In acetone solution, the triflato complex 7 is in equilibrium with the cation trans-[RhO=C(CH3)(2)}(=CPh2)((PPr3)-Pr-i)(2)](+) which after addition of NaBAr4F precipitates as the BAr4F salt 11. The starting material 1 as well as the bis(triphenylphosphine) and bis(triisopropylstibine) analogues 14 and 15 react with pyridine or acetonitrile in the presence of KPF6 to yield the cationic complexes trans-[Rh(py)(=CPh2)(PPh3)(2)]PF6 (16) and trans-[Rh(CH3CN)(=CPh2)(L)(2)]PF6 (L=(PPr3)-Pr-i (17), (SbPr3)-Pr-i (18)). The BAr4F salt of the cation trans-[Rh(CH3CN)(=CPh2)((SbPr3)-Pr-i)(2)](+) (19) was characterized by X-ray crystallography. Compounds 11, 16-19 and the bis(pyridine) derivative cis-[Rh(=CPh2)(NC5H5)(2)((PPr3)-Pr-i)]PF6 (12) are the first representatives of four-coordinate cationic ;diphenylcarbenerhodium(I) complexes. (C) 2001 Elsevier Science B.V. All rights reserved.