Photoinduced isomerisation of cis-[M(L-S,O)2](M = Pt(II) and Pd(II)) complexes of N,N-diethyl-N'-3,4,5-trimethoxybenzoylthiourea: key to preparation of the trans isomer.
In acetonitrile solutions at room temperature, cis-[M(L-S,O)2] Pt(II) and Pd(II) complexes of N,N-diethyl-N'-3,4,5-trimethoxybenzoylthiourea undergo reversible photoinduced isomerisation to the corresponding trans isomer upon irradiation with visible light in the 320-570 nm range, the rate and extent of isomerisation being significantly higher for the cis-[Pd(L-S,O)2] complex compared to the Pt(II) analogue; in the dark trans-[M(L-S,O)2] cleanly reverts back to the cis complex at a rate dependent on the solution temperature, indicating a thermally controlled reverse process.
Hanekom
Dirk
D
Department of Chemistry, University of Stellenbosch, Private Bag X1, Matieland, 7602, Stellenbosch, South Africa.
McKenzie
Jean M
JM
Derix
Nocky M
NM
Koch
Klaus R
KR