Ligand effects in the substitution chemistry of cis-bis(piperidine)tetracarbonylmolybdenum(O). A molybdenum-95 NMR study期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Ligand effects in the substitution chemistry of cis-bis(piperidine)tetracarbonylmolybdenum(O). A molybdenum-95 NMR study

Institution:	1. Electrical Engineering Department, DIT University, Dehradun, India;2. Electrical Engineering department, S.O.E, Gautam Buddha University, Greater Noida, U.P, India;1. Chemical Physics, Department of Chemistry, Lund University, P.O. Box 124, SE- 22100 Lund, Sweden;2. Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh;3. Department of Chemistry, P.O. Box 35, University of Jyväskylä, FI-40014 Jyväskylä, Finland;4. Department of Chemistry, University of North Texas, 1155 Union, Circle#305070, Denton, TX 76203, USA;5. Laboratory of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku, FI-20014 Turku, Finland

Abstract:	Molybdenum-95 NMR chemical shifts are reported for a series of Mo(O) compounds of the type Mo(CO)₄(pip)_2−nL_n(n = 1,2; L = substituted pyridine ligands). The σ(⁹⁵Mo) values correlate well with the pK_a values for the substituted pyridines; for the n = 1 series, σ (⁹⁵Mo) ranges from − 1053 ppm (pK_a = 1.86 for 4-CN) to − 1120 ppm (pK_a = 9.61 for 4-NMe₂). The effects of solvent polarity and some in situ reactivity studies are described and the nature of the MoL bond compared to that with piperidine and some other ligands is discussed.

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