Intramolecularly coordinated organoantimony(III) carboxylates

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• 作者：Lubom&#xed ; r Machuč ; a ; Libor Dost&#xe1 ; l ; Roman Jambor ; Karel H ; l&#xed ; ř ; Robert Jir&#xe1 ; sko ; Aleš ; Rů ; ž ; ič ; ka ; Ivana C&#xed ; sař ; ov&#xe1 ; ; Jaroslav Holeč ; ek
• 关键词：Antimony ; Chelating ligand ; Carboxylates ; NMR spectroscopy ; X-ray structure
• 刊名：Journal of Organometallic Chemistry
• 出版年：2007
• 出版时间：15 August 2007
• 年：2007
• 卷：692
• 期：18
• 页码：3969-3975
• 全文大小：440 K

文摘

The reactions of organoantimony chlorides L^1,2SbCl₂ 1 and 2 ([2,6-(ROCH₂)₂C₆H₃]⁻, R = Me; L¹ and R = t-Bu; L²) with silver salts of selected carboxylic acids resulted to corresponding organoantimony carboxylates L^1,2Sb(OOCR′)₂, 1a–c (for L¹) and 2a–c (for L²), where R′ = CH₃ for 1a, 2a; R′ = CHCH₂ for 1b, 2b and R′ = CF₃ for 1c, 2c. All compounds were characterized by the help of elemental analysis, ESI–MS, ¹H and ¹³C NMR spectroscopy. The solid state structure investigation using single crystal X-ray diffraction techniques (2a, c) and IR spectroscopy revealed significant differences in coordination mode of both O,C,O chelating ligand and carboxylic groups in this set of compounds. The structure of all compounds in solution of non-coordinating solvent (CDCl₃) was determined by means of variable temperature ¹H, ¹³C, ¹⁹F NMR spectroscopy and IR spectroscopy.