Potassium and Magnesium Complexes of the (Iminophosphoranyl)(selenophosphoranyl)methanide Ligand [CH(PPh2Se)(PPh2NSiMe3)](-)

作者：Thirumoorthi Ramalingam; Chivers Tristram

来源：European Journal of Inorganic Chemistry, 2015, 2015(13): 2188-2192.

DOI：10.1002/ejic.201500216

• Potassium
• Magnesium
• Se
• N ligands
• Structure elucidation
• NMR spectroscopy

The Se,N ligand CH2(PPh2Se)(PPh2NSiMe3) (1e) was prepared in excellent yield by treatment of [CH2(PPh2)(PPh2NSiMe3)] with selenium in hot toluene. Reactions of 1e with a small excess of KH or with Mg[N(SiMe3)(2)] in a 2:1 molar ratio in boiling THF or toluene produced [K{CH(PPh2Se)(PPh2NSiMe3)}](2) (K3e) or Mg{CH(PPh2Se)(PPh2NSiMe3)}(2) [Mg(3e)(2)], respectively. Compounds 1e, (K3e)(2), and Mg(3e)(2) were characterized by multinuclear (H-1, C-13, Si-29, P-31, Se-77) NMR spectroscopy, and their X-ray structures were determined. In the solid state the N,Se-coordinated potassium salt forms a centrosymmetric dimer via weak KSe interactions [3.269(1) angstrom]; the K+ ions also engage in intramolecular ((3) and (6)) interactions with neighboring phenyl groups. The homoleptic magnesium complex Mg(3e)(2) is monomeric and exhibits a Se,C,N-bonding mode [Mg-C 2.480(5) and 2.442(5) angstrom].

• 出版日期2015-5