(η5-Cyclopentadienyl)(κ3 -hydrotris(pyrazolyl)borate)cobalt(ii)—the first high-spin cobalt organometallic complexElectronic supplementary information (ESI) available: full characterisation data for all compounds. See http://www.rsc.org/suppdata/cc/b1/b105661c/

Abstract

(η⁵-Cyclopentadienyl)(κ³-hydr otris(pyrazolyl)borate)- cobalt(II) has been synthesised; magnetic and crystallographic data indicate this to be the first example of a high-spin cobalt organometallic complex whilst its pentamethylcyclopentadienyl analogue is found to have a low-spin electronic configuration.