Wavelength-selective photoisomerisation of nitric oxide and nitrite in a rhodium complex†
Abstract
Photoinduced linkage isomers (PLIs) of NO and NO2− are selectively generated by an appropriate choice of irradiation wavelength at low temperature within the same molecular complex [Rh(NO)(NO2)2(But2PH)2]. The structures of the PLIs are characterised by photocrystallography and the corresponding vibrational changes by infrared spectroscopy. Using red light about 37% of the κON isonitrosyl PLI can be produced while irradiation with blue light produces about 80% of the (O,O′) chelating NO2− isomer. Upon heating the NO2− PLI undergoes several structural transformations, which are characterised by infrared spectroscopy.