Preparation and crystal and molecular structure of two trialkylamine adducts of HCo(CO)4 showing a preferential NR3H+⋯[(OC)3Co(CO)]– interaction
Abstract
HCo(CO)4 and trialkylamines in hydrocarbon solution form 1:1 adducts, which may be described as NR3H+⋯[Co(CO)4]– ion pairs; X-ray crystal structure determinations show that in the solid state the inter-acting unit NEt2H+⋯[Co(CO)4]– has an N ⋯ Co contact of 3.72 Å with the nitrogen hydrogen on the threefold axis of rotation interacting with the C3Co part of the [Co(CO)4]– anion, in a sort of ‘elongated’ HCo(CO)4 structure, and a substantially similar molecular structure was found for NMe3H+⋯[Co(CO)4]–, the N ⋯ Co contact being reduced to 3.39 Å.