Abstract
Reactions of CO with nickel or platinum complexes of cyclic alkynes or arynes form initially metallacyclobutenone species, which undergo further insertion of CO to give five-membered metallacycles. The differences in regioselectivity observed for nickel or platinum have been investigated computationally by DFT methods. Although both metals prefer insertion of the second CO via a five-coordinate mechanism, the formation of the five-membered nickelacycle is under thermodynamic control, leading to a symmetrical nickelacyclopentene-2,4-dione complex, whereas platinum yields the kinetically favoured platinacyclopentene-2,3-dione complex. © 2000 Elsevier Science S.A. All rights reserved.
Original language | English |
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Pages (from-to) | 164-174 |
Number of pages | 11 |
Journal | Journal of Organometallic Chemistry |
Volume | 607 |
Issue number | 1-2 |
Publication status | Published - 11 Aug 2000 |
Keywords
- Acyl-complex
- CO insertion
- DFT calculation
- Metallacycle
- Nickel
- Platinum