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Structural diversity of organoantimony(III) and organobismuth(III) dihalides containing O,C,O-chelating ligands
Authors: Dostál Libor | Císařová Ivana | Jambor Roman | Růžička Aleš | Jirásko Robert | Holeček Jaroslav
Year: 2006
Type of publication: článek v odborném periodiku
Name of source: Organometallics
Publisher name: American Chemical Society
Place: Washington
Page from-to: 4366-4373
Titles:
Language Name Abstract Keywords
cze Strukturální rozdílnost organoantimonitých a bismutitých halogenidů obsahujících O,C,O-chelátující ligandy Bylo připraveno osum organoantimonitých a bismtítých sloučenin obsahující OCO ligandy.
eng Structural diversity of organoantimony(III) and organobismuth(III) dihalides containing O,C,O-chelating ligands Eight organoantimony and organobismuth dihalides, containing two types of O,C,O-chelating (so-called pincer) ligands, 2,6-(ROCH2)C6H3- (R = Me, L-1; R = Bu-t, L-2; (LSbCl2)-Sb-1 (1), (LSbCl2)-Sb-2 (2), (LSbI2)-Sb-1 (3), (LSbI2)-Sb-2 (4), (LBiCl2)-Bi-1 (5), (LBiCl2)-Bi-2 (6), (LBiI2)-Bi-1 (7), (LBiI2)-Bi-2 (8)) were prepared and characterized with the help of elemental analysis, electrospray ionization mass spectrometry, H-1 and C-13 NMR spectroscopy, and X-ray diffraction techniques. Except for 5, which exists as a centrosymmetric dimer, all studied compounds are monomeric in the solid state and the coordination polyhedra of the central atoms are distorted square-pyramidal. Both oxygen donor atoms are coordinated to the central metal through moderately strong or strong intramolecular interactions (range of Sb-O distances 2.279(2)-2.6912(14) and Bi-O distances 2.379(3)-2.460(4) angstrom), both in cis fashion for 1 and 2 (angles O-Sb-O 116.65-(5)degrees and 116.73(4)degrees) and trans fashion for 3, 4, and 6-8 (range of angles O-M-O; M = Sb or Bi, 142.26(12)-148.28(8)degrees). In noncoordinating solvents (CDCl3, toluene-d(8)) 1-8 display structures similar to those found in the solid state based on variable-temperature H-1 NMR measurements. RAY STRUCTURE-ANALYSIS; PINCER-TYPE LIGAND; INTRAMOLECULAR COORDINATION; CRYSTAL-STRUCTURES; ORGANOTIN CHEMISTRY; MOLECULAR-STRUCTURE; TRIVALENT BISMUTH; SOLUTION BEHAVIOR; DYNAMIC-BEHAVIOR; EDGE INVERSION

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