612-16-8Relevant articles and documents
Heterobimetallic tin(II) oxido clusters of the type [{Sn6(μ3-O)4(μ3-OCH2R)4} {W(CO)5}4] and [{Sn5(μ3-O)2(μ-OCH2R)4(μ3-OCH2R)2}{Fe(CO)4}2]
Mertens, Lutz,Leonhardt, Christian,Rüffer, Tobias,Toma, Ana,Silvestru, Cristian,Mehring, Michael
, p. 206 - 213 (2016)
Reaction of the tin(II) alkoxides bis(2-methoxyphenylmethanolate)tin(II) (1) and bis(2,4-dimethoxyphenylmethanolate)tin(II) (2) with [W(CO)5(thf)] and [Fe2(CO)9], respectively, gave the heterobimetallic tin(II) oxido clusters [{Sn6(μ3-O)4(μ3-OCH2R)4}{W(CO)5}4] [3, R[dbnd6]C6H4(OCH3)-2); 4, R[dbnd6]C6H3(OCH3)2-2,4] and [{Sn5(μ3-O)2(μ-OCH2R)4(μ3-OCH2R)2}{Fe(CO)4}2] [5, R[dbnd6]C6H3(OCH3)2-2,4] which were isolated reproducibly with fair yield as a result of partial hydrolysis in the presence of moisture. The metal oxido clusters are composed of polynuclear tin(II) oxido cages entrapped by arylmethanolato ligands and coordinated to metal carbonyl moieties via lone pairs of electrons at tin. The compounds were analyzed by single crystal X-ray diffraction analysis (1, 4·2THF and 5), elemental analyses, ATR-IR spectroscopy and1H,13C{1H} and119Sn{1H) NMR spectroscopy in solution as well as in solid state.
Iron-catalyzed chemoselective hydride transfer reactions
Coufourier, Sébastien,Ndiaye, Daouda,Gaillard, Quentin Gaignard,Bettoni, Léo,Joly, Nicolas,Mbaye, Mbaye Diagne,Poater, Albert,Gaillard, Sylvain,Renaud, Jean-Luc
supporting information, (2021/06/07)
A Diaminocyclopentadienone iron tricarbonyl complex has been applied in chemoselective hydrogen transfer reductions. This bifunctional iron complex demonstrated a broad applicability in mild conditions in various reactions, such as reduction of aldehydes over ketones, reductive alkylation of various functionalized amines with functionalized aldehydes and reduction of α,β-unsaturated ketones into the corresponding saturated ketones. A broad range of functionalized substrates has been isolated in excellent yields with this practical procedure.
Application of bis(phosphinite) pincer nickel complexes to the catalytic hydrosilylation of aldehydes
Chang, Jiarui,Fang, Fei,Tu, Chenhao,Zhang, Jie,Ma, Nana,Chen, Xuenian
, (2020/10/27)
A series of bis(phosphinite) (POCOP) pincer ligated nickel complexes, [2,6-(tBu2PO)2C6H3]NiX (X = SH, 1; SCH2Ph, 2; SPh, 3; NCS, 4; N3, 5), were used to catalyse the hydrosilylation of aldehydes. It was found that both complexes 1 and 2 are active in catalysing the hydrosilylation of aldehydes with phenylsilane and complex 1 is comparatively more active. The expected alcohols were isolated in good to excellent yields after basic hydrolysis of the resultant hydrosilylation products. However, no reaction was observed when complex 3 or 4 or 5 was used as the catalyst. The results are consistent with complexes 1 and 2 serving as catalyst precursors, which generate the corresponding nickel hydride complex [2,6-(tBu2PO)2C6H3]NiH in situ, and the nickel hydride complex is the active species that catalyses this hydrosilylation process. The in situ generation of the nickel hydride species was supported by both experimental results and DFT calculation.
