The unusual hydridicity of a cobalt bound Si–H moiety

Abstract

A paramagnetic cobalt–SiH intermediate possessing the Co–(η¹-H–Si) moiety was studied using various spectroscopic techniques. Frozen solution ENDOR experiments show a Co–H distance of ∼1.53 Å and a Si–Co–H angle of ∼15°, whereas XRD data suggest a TBP geometry about a Co(II) centre. Its stepwise deprotonation with base followed by dehalogenation was identified experimentally and theoretically.