Abstract
Cobalt(III) complexes of two ligands containing two tertiary stibine groups, [Co{oC6H4(SbMe2)2)2X2]X (X = Cl, Br, I) and [Co{Me2Sb(CH2)3SbMe2)2X2]X (X = Br, I), have been prepared and shown to have trans pseudooctahedral cations. The synthesis of trans-[Co(o-C6H4(SbMe2)(PMe2)}2X2]Y (X = Cl, Br, I; Y =X, BF4), trans-[Co{o-C6H4(PPh2)(SMe))2X2]BF4, trans-[Co{o-C6H4(PPh2)(SeMe)}2X2]BF4(X = Cl, Br), and fac-[Co{o-C6H4(PPh2)(SMe)}3](BF4)3 are described. The complexes have been characterized by UV-visible spectroscopy and multinuclear (1H,31P{1H), 77Se{1H}) NMR as appropriate. 59Co NMR spectra are reported for these complexes, and the characteristic ranges of the 59Co chemical shifts for Co(III) complexes containing neutral heavy groups VB and VIB (groups 15 and 16) donor ligands are established. The X-ray structure of [Co{o-C6H4-(SbMe2)2)2Cl2]2[CoCl4] has been determined. Crystals belong to the tetragonal system, space group 141/a (No. 88), with a = 25.264 (6) Å, c = 9.720 (9) Å, and Z = 4. The structure was refined to an R of 0.058 from 1237 observed reflections (F> 3σ(F)). The cobalt of the cation is located on a center of symmetry (Co-Sb = 2.505 (1), 2.478 (1) Å; Co-Cl = 2.263 (4) Å), and the anion has 4 symmetry (Co-Cl = 2.287 (6) Å).
Original language | English |
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Pages (from-to) | 2102-2106 |
Number of pages | 5 |
Journal | Inorganic Chemistry |
Volume | 26 |
Issue number | 13 |
DOIs | |
Publication status | Published - 1 Jul 1987 |
Externally published | Yes |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry