30106-92-4Relevant academic research and scientific papers
A 2-iridathiophene from reaction between IrCl(CS)(PPh3) 2 and Hg(CH=CHPh)2
Lu, Guo-Liang,Roper, Warren R.,Wright, L. James,Clark, George R.
, p. 972 - 981 (2007/10/03)
The thiocarbonyl analogue of Vaska's compound is produced in high yield by first treating IrCl(CO)(PPh3)2 with CS2 and methyl triflate to give [Ir(κ2-C[S]SMe)Cl(CO)(PPh 3)2]CF3SO3 (1), secondly, reacting 1 with NaBH4 to give IrHCl(C[S]SMe)(CO)(PPh3)2 (2), and finally heating 2 to induce elimination of both MeSH and CO to produce IrCl(CS)(PPh3)2 (3). When IrCl(CS)(PPh3) 2 is treated with Hg(CH=CHPh)2 the novel 2-iridathiophene, Ir[SC3H(Ph-3)(CH=CHPh-5)]HCl(PPh3)2 (4) is produced. The X-ray crystal structure of the iodo-derivative of 4, Ir[SC 3H(Ph-3)(CH=CHPh-5)]HI(PPh3)2 (5) confirms the unusual 2-metallathiophene structure. Treatment of IrCl(CS)(PPh 3)2 with Hg(CH=CPh2)2 produces both a coordinatively unsaturated 1-iridaindene, Ir[C8H 5(Ph-3)]Cl(PPh3)2 (6) and a chelated dithiocarboxylate complex, Ir(κ2-S2CCH=CPh 2)Cl(CH=CPh2)(PPh3)2 (7). X-ray crystal structure determinations for 6 and 7 are reported.
Convenient syntheses of [IrCl(CS)(PPh3)2] and a Bis(thiocarbonyl) complex of iridium
Hill, Anthony F.,Wilton-Ely, James D. E. T.
, p. 3791 - 3797 (2008/10/08)
Treating [IrCl(CO)(PPh3)2] with ClC(=S)OR (R = C6H4Me-4) provides [IrCl2{C(=S)OR}-(CO)(PPh3)2], which reacts with NaBH4 to give [IrHCl{C(=S)OR}(CO)(PPh3)2]. The aryloxide group is cleaved by HCl to give [IrHCl2(CS)(PPh3)2], which is dehydrochlorinated by DBU to provide [IrCl(CS)(PPh3)2] (overall yield for Ir(CO) → Ir(CS) 75%). Treating [IrCl(CS)-(PPH3)2] with ClC(=S)SPh provides [IrCl2{C(=S)SPh}(CS)(PPH3)2] (in equilibrium with [IrCl-(η2-SCSPh)(CS)(PPH3)2]Cl) which reacts subsequently with I2 or ICl to provide [IrCl2(CS)2-(PPH3)2]X (X = I3, Cl). [Ir(CS2Ph)Cl2(CO)(PPH3)2], however, reacts with I2 to provide [IrClI2(CS)(PPH3)2]. Reaction of [IrHCl2(CS)(PPH3)2] with CNC6H3Me2-2,6 does not proceed via migratory insertion but, rather, leads to reduction of iridium and formation of the salt [Ir(CNC6H3Me2-2,6)2(CS)(PPH 3)2]Cl. ? Dedicated to Professor Max Herberhold on the occasion of his 60th birthday.
