Metal carbonyl complexes of phenylphosphine and diphenylphosphine

Phosphine, arsine and stibine complexes of manganese(I) carbonyl halides: synthesis, multinuclear NMR spectroscopic studies, redox properties and crystal structures

“…The values of ν(CO) obtained for the compounds reprepared in this work are in good agreement with the literature. 3,6, 7 The solution IR spectroscopic studies show three strong CO stretching vibrations (Table 1), and the frequencies and relative intensities of the three bands do not differ greatly between compounds. In all cases the stretching frequencies are comparable with ν(CO) reported for fac-[MnCl(CO) 3 (SbPh 3 ) 2 ] (2024, 1955, 1912 cm Ϫ1 ) but distinctly different from the values for mertrans-[MnCl(CO) 3 (SbPh 3 ) 2 ] (1950, 1909 cm Ϫ1 ).…”

“…3-6 However we have resynthesized these compounds to compare their NMR properties with those of the other phosphine, arsine and stibine derivatives. The compounds [MnBr(CO) 4 7 and a series of cationic manganese() complexes involving PPh 2 H, [Mn(CO) x (PPh 2 H) 6 Ϫ x ] ϩ (x = 2-5), have also been described previously, 8 although multinuclear NMR spectroscopic data for these are very limited. The chemistry of RSbCH 2 SbR (R = Ph or Me) with metal carbonyls including Mn I ) has been reported, and the ligand binds either in an η 1 mode or µ-bridging mode.…”

Broadening the Scope of Ancillary Phosphane‐Type Ligands: A Systematic Comparison of PR3, PR2BH3–, and SiR3– and Their Chalcogen Derivatives

“…These values compare favorably with those found in the literature for similar complexes. [81][82][83] Introduction of the BH 3 moiety and consequently of a negative charge in 12a leads to a marked decrease in the frequencies of these vibrations to 2030 and 1982 cm -1 (MeCN solution). The relatively low-energy bands found for complex 13 (1994 and 1938 cm -1 ; MeCN .…”

Bis[tris(tetrahydrofuran)lithium(1+)] bis(μ-diphenylphosphanido)bis(tetracarbonylmolybdate)(2–)

“…Binuclear transition metal complexes [M2(/z-PR2)2-(CO)8] (M= Cr, Mo, W) have been investigated extensively with respect to their synthesis, bonding, chemical and electrochemical properties (Linck & Nassimbeni, 1973;Treichel, Dean & Douglas, 1972;Keiter et al, 1992). It has been demonstrated that the complex [W2(#-PPh2)2(CO)s] undergoes twoelectron reduction with cleavage of the MmM bond to give the dianion [W2(/z-PPh2)2(CO)8] 2- (Shyu, Calligaris, Nardin & Wojcicki, 1987).…”