Abstract
The compounds of 1-CCPh-2-Ph-3-(?-L)-3,1,2-RhC2B9H9 (L=C5H5, 1, and C5Me5, 2) have been prepared. The weighted average 11B-NMR chemical shift (11B>) for 1 is +2.53 ppm, suggesting that the cage is distorted into a semipseudocloso structure. For 2 in CDCl3 11B> is -0.7 ppm, between that anticipated for semipseudocloso and closo forms. Compound 2 crystallises in two different forms. Orange 2a is semipseudocloso, with C(1)-C(2) 2.052(5) Å, whilst yellow 2b is essentially closo, with C(1)-C(2) 1.828(7) Å. Dissolution of both 2a and 2b in CDCl3 affords an identical solution. © 2000 Elsevier Science B.V.
| Original language | English |
|---|---|
| Pages (from-to) | 153-157 |
| Number of pages | 5 |
| Journal | Journal of Organometallic Chemistry |
| Volume | 614-615 |
| Publication status | Published - 8 Dec 2000 |
Keywords
- Carbametallaborane
- Closo
- Crystallographic characterisation
- Pseudocloso
- Semipseudocloso
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Garrioch, R. M., Rosair, G. M., & Welch, A. J. (2000). Closo and semipseudocloso forms of the same carbametallaborane: Synthesis and spectroscopic and crystallographic characterisation of 1-CCPh-2-Ph-3-(η-L)-3,1,2-RhC2B9H9 (L=C5H5 and C5Me5): Part 25. Steric effects in heteroboranes. Journal of Organometallic Chemistry, 614-615, 153-157.