Chloro(3-or 5-aminoquinoline)rhodium(I) organocomplexes showing N-H centerdot center dot center dot CI and C-H center dot center dot center dot Rh weak interactions

The reaction of [RhCl(L-2)](2) with 3- or 5-aminoquinoline (n-aqui) gives n eutral tetracoordinated rhodium(I) compounds [RhCl(L-2)(n-aqui)] (L-2 = COD , n-aqui = 5-aqui 1, 3-aqui 2; L-2 = NBD, n-aqui = 5-aqui 3, 3-aqui 4) with n-aqui bonded through the heterocyclic nitrogen. Structures of complexes 1 and 2 were determined by single crystal X-ray diffraction. Both compounds show intermolecular hydrogen bond N-H ... Cl linkages and contain doubly hy drogen-bonded 'dimer pairs'. In 1 additional N-H ... Cl interactions betwee n the 'dimer pairs' gives double chains along the y-axis. Compound 2 crysta llises as diethyl ether adduct, 2 . Et2O and the 'dimer pairs' form N-H ... O hydrogen bonds with solvation molecules. For 1 a C-H ... Rh interaction is observed in the crystal. In solution, compounds 1-4 undergo intra- and i ntermolecular processes that are discussed. The reaction of [RhCl(CO)(2)](2 ) with n-aqui gives monomers [Rh(Cl)(CO)(2)(n-aqui)] (n-aqui = 5-aqui 5, 3- aqui 6) with n-aqui bonded through the heterocyclic nitrogen when Rh:n-aqui = 1:1 or the dimer compound with bridging ligand, [Rh(Cl)(CO)(2)](2)(mu-5- aqui) (7) when Rh:5-aqui = 2:1. (C) 1999 Elsevier Science S.A. All rights r eserved.