Abstract

Cyrhetrenyl Schiff base derivatives of the form (η5-C5H4CH{double bond, long}NAr)Re(CO)3, [Ar = Ph (1a) C6H4OMe-p (1b) and C6H4NO2-p (1c)] have been prepared from cyrhetrenylcarbaldehyde and the corresponding aromatic amines. 1H and 13C NMR indicates that these compounds have the anti-(E) conformation in solution and the X-ray crystal structure of 1b confirms that it also adopts the anti-(E) form in the solid state. Further reaction of cyrhetrenylaldimines 1 with sodium borohydride in methanol produces quantitatively, the corresponding amine derivatives (η5-C5H4CH2-NHAr)Re(CO)3 [Ar = Ph (2a) C6H4OMe-p (2b) and C6H4NO2-p (2c)]. All these cyrhetrenylamines were characterized by IR, 1H and 13C NMR, MS. Additionally, 2b has been characterized structurally. © 2008 Elsevier Ltd. All rights reserved.