Unexpected carbon-carbon coupling between organic cyanides and isopropyl {beta}-carbon in a hafnium ene diamide complex

Journal Article · Mon Jun 01 00:00:00 EDT 1992 · Organometallics

DOI:https://doi.org/10.1021/om00042a002· OSTI ID:458717

Bol, J E; Hessen, B; Teuben, J H ^[1]; Smeets, W J.J.; Spek, A L ^[2]

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1. Univ. of Groningen (Netherlands)
2. Univ. of Utrecht (Netherlands)

Reaction of the ene diamide complex Cp*Hf({sigma}{sup 2},{pi}-iPr-DAB)Cl (1; Cp* = {eta}{sup 5}-C{sub 5}Me{sub 5}, iPr-DAB = 1,4-diisopropyl-1,4-diaza-1,3-butadiene) with organic cyanides was investigated. The crystal structure of the product, Cp*Hf[iPrNCH{double_bond}CHNC(Me){double_bond}CHC(tBu){double_bond}NH]Cl, is reported. The reaction is thought to proceed by two hydrogen transfers and a C-C coupling on the {beta}-carbon of an isopropyl group. NMR was used to identify reaction intermediates in the hydrogen transfer scheme.

• Sponsoring Organization: USDOE
• OSTI ID: 458717
• Journal Information: Organometallics, Journal Name: Organometallics Journal Issue: 6 Vol. 11; ISSN 0276-7333; ISSN ORGND7
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
CHEMICAL REACTIONS
HAFNIUM COMPLEXES
NUCLEAR MAGNETIC RESONANCE
ORGANIC NITROGEN COMPOUNDS
ORGANOMETALLIC COMPOUNDS
REACTION INTERMEDIATES