1288. New triphenylphosphine-iridium compounds

Abstract

The preparation and properties of the unsaturated hydride IrH, (PPh,) , and of the carbonyl hydrides IrHCO(PPh,), and IrH,CO(PPh,), are reported. From these, with perchloric acid, IrH,CO(PPh,),ClO, has been obtained, which by action of carbon monoxide gives Ir(CO),(PPh,),C10,. This perchlorate with alkaline methanol forms the novel organometallic methoxycarbonyl compound Ir(C0,Me) (CO),(PPh,),. Tentative structures, deduced from infrared spectra and electric moments in solutions, are assigned to these compounds and to some of their derivatives.THE complex iridium hydrides so far described are of the types IrH,L, with L = PPh, 1 or PEt,Ph Continuing our work on complex iridium compounds with triphenylphosphine as ligand, we now report on an unsaturated hydride IrH3L, and two carbonyl hydrides: IrHCOL, and IrH,COL,; also the perchlorate of two complex cations, which can be considered substitution products of [Ir(CO),]+, as well as a novel organometallic derivative Ir(C0,Me) (CO),L,.The Unsaturated Hydride IrH3L2.-By reduction of IrHI,L, and [IrI,L,] I, with sodium hydroborate or lithium tetrahydroaluminate, we obtained a stable compound (I), almost and IrH(CO)L, with L = PPh,.,

New methods for the synthesis of 4H‐dithieno[3,2‐b:2′,3′‐d]pyrrole

“…Pd(PPh) 4 , 2‐(tributylstannyl)thiophene, 5‐bromothiophene‐2‐sulfonyl chloride 7 , 5‐bromo‐4‐nitrothiophene‐2‐sulfonyl chloride 8 , 2‐bromo‐3‐nitrothiophene 9 , 3,3′‐dibromo‐2,2′‐bithiophene 11 , 4‐ tert ‐butyloxycarbonyl‐4 H ‐dithieno[3,2‐ b :2′,3′‐ d ]pyrrole 12 , and triphenylsilylamine were synthesized according to literature procedures.…”

Palladium catalysed hydroxycarbonylation of 1-phenylethanol in molten salt media

“…Catalytic precursors PdCl 2 (PPh 3 ) 2 , Pd(PPh 3 ) 4 , PdCl 2 (PhCN) 2 , and PdCl 2 (Py) 2 were prepared as previously described [48][49][50][51]. Molten salts were purchased from Acros Organics and Fluka.…”

Synthesis and Characterization of Pentaarylated [60]Fullerene Coordinated Complexes [(η2‐Ar5C60H)M(PPh3)2] (M = Pt, Pd) and an ab initio Study on Their Isomerism

“…All solvents were bubbled with nitrogen for at least 15 min before use. [Pt(PPh 3 ) 4 ], [15] [Pd(PPh 3 ) 4 ], [16] Ph 5 C 60 H, [3] (m-MeC 6 H 4 ) 5 C 60 H, [9] and (pMeC 6 H 4 ) 5 C 60 H [9] were prepared by literature methods. IR spectra were measured with a Bio-Rad FTS 135 spectrophotometer, whereas 1 H{ 31 P} NMR and UV/Vis spectra were recorded with a Bruker AC P200 and a Shimadzu UV 240 spectrometer, respectively.…”