Photosubstitution of iron carbonyl phosphine complexes: quantum yield, kinetic, and thermochemical studies
作者:Suresh K. Nayak、Theodore J. Burkey
DOI:10.1021/ja00067a064
日期:1993.7
Fe(CO) 3 (PR 3 ) 2 (R=alkyl) in cyclohexane at 337 nm have been determined for the first time. In addition, time-resolved experiments provided the kinetics of the second step of the substitution, phosphine reaction with the intermediate formed upon CO dissociation. Several interesting results, with implications for understanding the interaction of probe molecules with potentially reactive metals centers
The preparation, reactions, and infrared spectra of some derivatives of bis(tricarbonylnitrosyliron)mercury
作者:M. Casey、A. R. Manning
DOI:10.1039/j19700002258
日期:——
Complexes of the type [HgFe(CO)2(NO)L}2][L = R3P, (RO)3P, R3As, and R3Sb; R = alkyl or aryl] have been prepared. They react with mercury(II) halides to give [XHgFe(CO)2(NO)L] derivatives, some of which have been isolated (L = CO and PhEt2As; X = Br and l). The i.r. spectra of both series of compounds indicate that they possess linear L–Fe–Hg–X systems [X = Cl, Br, I, and Fe(CO)2(NO)L] with trigonal
[Hg Fe(CO)2(NO)L} 2 ]类型的配合物[L = R 3 P,(RO)3 P,R 3 As和R 3 Sb; R =烷基或芳基]已经制备。它们与汞(反应II)卤化物,得到[XHgFe(CO)2其中的一些已经被分离(NO)L]的衍生物,(L = CO和碧2个作为; X = Br和1)。两种化合物的红外光谱表明,它们具有线性的L–Fe–Hg–X系统[X = Cl,Br,I和Fe(CO)2(NO)L] ,并且铁的三角双锥体配位作用原子。母体化合物[Hg Fe(CO)3 NO} 2],在二甲亚砜溶液中完全解离,得到[Fe(CO)3 NO] -离子。取代的衍生物不离子化。
Mechanism of the reaction of chelated tricarbonyliron complexes of α,β-unsaturated Schiff bases with Group 5 ligands
作者:Gianfranco Bellachioma、Giuseppe Cardaci
DOI:10.1039/dt9770002181
日期:——
The complexes [Fe(CO)3(η-PhCHCH–CHN–C6H4X)](X = H, or 4-NMe2, -OMe, -Me, or -Br) react with phosphine ligands to give [Fe(CO)2L (η-PhCHCH–CHN–C6H4X)]. The preparation of the phosphine derivatives is described. The kinetics of substitution by the phosphine ligands L (PPh3 or PBun3) are first order in the complex concentration and the pseudo-first-order rate constants vary with ligand concentration.
配合物[Fe(CO)3(η-PhCHCH –CH N–C 6 H 4 X)](X = H或4-NMe 2,-OMe,-Me或-Br)与膦配体反应生成给出[Fe(CO)2 L(η-PhCHCH –CH N–C 6 H 4 X)]。描述了膦衍生物的制备。膦配体L(PPh 3或PBu n 3)是复数浓度中的一阶,伪一阶速率常数随配体浓度而变化。速率常数对配体浓度和温度,取代基X的影响以及配体L pornt的性质对具有两种途径的反应机理的依赖关系,一种途径使配体缔合,另一种涉及快速η的离解4 ⇌的试剂复合σ平衡。
Übergangsmetall-Silyl-Komplexe
作者:Ulrich Schubert、Michael Knorr、Carmen Straßer
DOI:10.1016/0022-328x(91)86007-d
日期:1991.7
reactions of cis-Fe(CO)4(CiCl3)2 (1d): with PPh3 or PMePh2 only the phosphine-substituted derivatives Fe(CO)3(PR3)(SiCl3)2 are formed, while the more basic phosphinesPMe2Ph or PMe3 give the SiCl2-bridged dinuclearcomplexes Fe2(CO)8−n(PR3)n(μ-SiCl2)2 (PMe2Ph: n = 2; PMe3: n = 1, 2) instead. The formation of SiR2-bridged complexes in the reaction of Fe(CO)4(SiR3)2 with phosphines is restricted to the