The chemistry of the group V metal carbonyls V. The preparation of derivatives of tetracarbonyl-[1,2-bis(diphenylphosphino)ethane]vanadium(0)

Catalysis Involving the H• Transfer Reactions of First‐Row Transition Metals

“…Calculations at the B3LYP level of theory on the hypothetical VH 5 give it the weakest M -H bond (43 kcal mol − 1 ) among neutral " valency -saturated " MH n (i.e., among complexes where M forms the maximum number of M -H bonds) [15] . Experimentally Table 1.1 [13] shows very weak V -H bonds for (P -P)(CO) 4 VH (P -P = Ph 2 P(CH 2 ) n PPh 2 , with n = 1 (dppm), n = 2 (dppe), n = 3 (dppp), and n = 4 (dppb) [16,17] .…”

Reactivity of (trimpsi)V(NO)X2Complexes (X = Cl, Br, I; trimpsi =tBuSi(CH2PMe2)3). Synthesis of the First Group 5 Alkyl Nitrosyls

“…Vanadium(I) complexes also tend to be very reactive. Many are thermally unstable at ambient conditions, even under an inert atmosphere. − For instance, hydrides such as VH(CO) 4 (dmpe) tend to decompose at room temperature by releasing H 2 . − Similarly, the halide complexes [CpV(CO) 3 X] - (where X = Cl, Br, I) disproportionate to CpV(CO) 4 and other unisolated vanadium-containing species . A few vanadium(I) alkyls such as [CpV(CO) 3 Me] - and VMe(CO) 4 (L 2 ) (L 2 = dppe, diars) are known, , and each of these complexes can be synthesized by adding an alkyl halide to an anionic vanadium carbonyl complex.…”