Scrambling of dithioacid ligands in some (η-cyclopentadienyl)nitrosyl-molybdenum and -tungsten derivatives

Structural dynamics and ligand mobility in carboxylate and dithiocarbamate complexes of Ru(II) containing 1,1′-bis(diphenylphosphino)ferrocene (dppf)

“…The incidence of uni-and bidentate dithio ligand exchange as suggested here is reminiscent of earlier examples, viz. (C 5 Me 5 )M(S 2 CNMe 2 ) 2 (M 0/Rh, Ir), conclusively studied via kinetic line-shape analysis [30] and CpMo(NO)(S 2 COMe) 2 , also studied by VT-NMR spectral analysis [31]. Indeed, such phenomena are quite common in transition metal complexes containing (SÁ/S) ligands and it has been pointed out in previous reports that simultaneous mono-and bidentate coordination of the S Á/S groups may arise because of geometrical constraints imposed by the central metal atom or electronic factors [32,33].…”

Recent organometallic nitrosyl chemistry

“…66 The acetate ligands are formulated as being r/2-bound on the basis of their IR spectra. Similar reaction of Cp2Mo(NO) (j72-S2CNMe2) with trifluoroacetic Nucleophilic attack of hydride on the cationic complex [CpRe(NO)(CO)2]+ produces the neutral formyl complex CpRe(NO)(CO)(CHO) (53). Its subsequent reduction and decomposition reactions123 have been extensively studied and are the principal subject of an enlightening review article.151 Hydride reduction of the second carbonyl group in 53 has been achieved to produce a diformyl complex 54 plex cannot be isolated, but it has been fully characterized by IR and XH NMR spectroscopies.…”

Reactivity and crystal structures of the first dithiocarbamate chromium(0) and dithiophosphate tungsten(0) complexes: crystal structures of [Et4N][Cr(η2-S2CNC5H10)(CO)4] and [Et4N][W{η2-S2P(OEt)2(CO)4]

“…For the VIB group, complexes involving dithiophosphato ligands have been reported in high oxidation-state [7]. The low oxidation-state of the organometallic dithiophosphate molybdenum complexes have been studied in [Et 4 N][Mo{h 2 -S 2 P(OEt) 2 (CO) 4 ]] [8], [CpMo{h 2 -S 2 P(OR) 2 } 2 (NO)] [9], [Mo{h 2 -S 2 P(OEt) 2 }(CO) 2 (S 2 CPCy 3 )(SnPhCl 2 )] [10] and [Mo(h 3 -C 3 H 5 )(CO) 2 {h 2 -S 2 P(OEt) 2 }] 2 (m-NH 2 NH 2 ) [11]. Some reports described the [Cat][M(CO) 4 L Ã/L] (Cat 0/ Na, K, NH 4 ; LÃ/L 0/dithiocarbamato, xanthato, dithiophosphato) type complexes and these complexes were very unstable and non-isolable [12].…”