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• W2005491421 abstract "Abstract Stable six-coordinate derivatives [(Q)2SnRX] [QH is 1-phenyl-3-methyl-4-R′C(O)-pyrazol-5-one (R′  4-BrC6H4 {QBrH}, 4-FC6H4 {QFH}, 4-ClC6H4 {QClH}, 4-IC6H4{QIH}, or 4-C7H15 -C6H4 {QRH}), X  Cl or R, and R  Cl, Me, nBu, tBu, Ph, vinyl or benzyl] and 1:1 adducts [(QH) SnRnX4−n]·xS [QH = 1-phenyl-3-methyl-4-R′C(O)-pyrazol-5-one (R′  4-BrC6H4, 4-FC6H4 or 4-C7H15-C6H4; X  Cl or R and R  Cl, Me, or Ph; x = 0, 1 2 , or 1; S  CH2Cl 2, H2O, or Et2O] have been synthesized and characterized by analysis and spectral (IR, and 1H, 13C, and 119Sn NMR) data. The diffraction study of the complex [(QBr)2SnMe2] shows the metal to be six-coordinate in a skewed trapezoidal bipyramidal (STB-6) geometry; SnO distances are 2.104(4) and 2.099(4) A, and 2.385(5) and 2.436(5) A and the Me SnMe bond angle is 154.5(3)°. In QBr, 4-bromophenyl and the pyrazolone rings are nearly coplanar. This co-planarity is opposed by an intramolecular repulsive force between one ortho H atom of the bromophenyl moiety and one O atom of the chelate ring. This feature appears related to the small bite of the ligand QBr (OSnO bond angles of 78.5(2)° and 79.5(2)°) which may be responsible for the STB-6 geometry." @default.
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• W2005491421 date "1994-12-01" @default.
• W2005491421 modified "2023-09-25" @default.
• W2005491421 title "Synthesis, characterization and spectroscopic investigations of tin(IV) and organotin(IV) derivatives of 4-aroyl-5-pyrazolones. Crystal structure of trans-dimethylbis[1-phenyl-3-methyl-4-(4-bromobenzoyl)- pyrazolon-5-ato]tin(IV)" @default.
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• W2005491421 doi "https://doi.org/10.1016/0022-328x(94)87155-8" @default.
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