Chromium complexes of hydroxyl-functionalised 1,3,5-triazacyclohexanes

Abstract

The chromium co-ordination chemistry of three 1,3,5-triazacyclohexanes bearing hydroxyl-functionalised substituents on nitrogen has been explored. The complexes [CrL₃(C₃H₆N₃R₃)] (L = CO, R = CH₂CH₂OH, CH₂CH₂CH₂OH or o-hydroxybenzyl; L  = Br, R = CH₂CH₂CH₂OH) have been prepared. Characterisation of the carbonyl complexes by spectroscopic and structural methods indicated that the triazacyclohexanes co-ordinate to the chromium centre through the three nitrogen atoms only. Crystal structure determinations for 1,3,5-tri(o-hydroxybenzyl)-1,3,5-triazacyclohexane and [Cr(CO)₃(C₃H₆N₃R₃)] (R = CH₂CH₂OH or CH₂CH₂CH₂OH) have been made.