Sb-X bonds

The broken bonds (boldface = dissociated recommended data reference in parentheses) Methods (reference in  

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Beside Ge-Te, Sb-Te and X-Te (X = Cu, Ag, and Au) bonds, there are a number of other bond pairs such as, Ge-Sb, Ge-X, and Sb-X bonds which are often termed... 

A strictly entropically controlled tendency for statistical ligand distribution was discussed 150) for ligand exchange when the sum of the Sb—X and Sb—Y bond energies remains constant. Calculations show that due to the electronic interaction in the entire molecule an energetic tendency also exists to form Lewis acids with mixed ligand spheres ... 

To date, 15 stibine R3M Sb(R/)3 (M = B, Al, Ga, In) and six bismuthine adducts R3M Bi(R )3 (M = Al, Ga) have been structurally characterized by single crystal X-ray diffraction. Their M-E, M-X and E-X bond lengths as well as X-M-X and X-E-X bond angles are summarized in Tables VI, YII and VIII. Figures 6-9 show the solid state structures of four representative adducts. 

The first secondary stibine, the structure of which was elucidated by X-ray diffraction, was MeSjSbH . This hydride is exceptionally stable and possesses (as expected) a trigonal pyramidal structure (CSbC, 101.7°). Reaction according to equation 26 formed the planar (X-ray) Cu2Sb2 heterocycle containing essentially identical Cu-Sb distances of 270 pm in agreement with a real Cu-Sb single bond (sum of covalent radii = 268 pm) . 

By use of the bidentate ligand 81, hexacoordinate antimony anions 82 containing five Sb—C bonds and bismuth anions 83 containing four Bi—C bonds have been characterized spectroscopically (equations 292 and 293 ). Neutral compounds 84 have been prepared and their X-ray analysis has shown that they have a distorted octahedral structure (equation 294 " ). 

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