| Autor: |
Rozenel SS; Department of Chemistry, University of California , Berkeley, California 94720, United States., Padilla R, Arnold J |
| Jazyk: |
angličtina |
| Zdroj: |
Inorganic chemistry [Inorg Chem] 2013 Oct 07; Vol. 52 (19), pp. 11544-50. Date of Electronic Publication: 2013 Sep 19. |
| DOI: |
10.1021/ic4018882 |
| Abstrakt: |
The reduction chemistry of cobalt complexes with HPNP (HPNP = HN(CH2CH2P(i)Pr2)2) as a supporting ligand is described. Reaction of [(HPNP)CoCl2] (1) with n-BuLi generated both the deprotonated Co(II) species [(PNP)CoCl] (2) along with the Co(I) complex [(HPNP)CoCl] (3). Products resulting from reduction of 2 with KC8 vary depending upon the atmosphere under which the reduction is performed. Monomeric square planar [(PNP)CoN2] (4) is obtained under dinitrogen, whereas dimeric [(PNP)Co]2 (5) is formed under argon. Over time, 5 activates a C-H bond in the PNP ligand to form the species [Co(H)(μ-PNP)(μ-(i)Pr2PCH2CH2NCHCH2P(i)Pr2)Co] (6). We also observed the oxidative addition of H-Si bond to complex 3 to form [(HPNP)CoCl(H)SiH2Ph] (7). (1)H NMR studies showed that species 7 is in equilibrium with 3 and silane in solution. Complex 3 can be oxidized with AgBPh4 to generate {(HPNP)CoCl}BPh4 (8), a square planar species with a formal electron count of 15 electrons. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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