Transition metal vinylidene complexes as supramolecular building blocks: nucleobase-mediated self-assembly of crystals with hexagonal symmetry†
Abstract
Reaction of the ruthenium half sandwich compound RuCl(η5-C5H5)(PPh3)2 with the uracil (Ur) substituted CUr in the presence of
C
CHUr)(η5-C5H5)(PPh3)2][X] which crystallize in the hexagonal space group P6(3)/m. The hexagonal symmetry inherent to the system is due to the formation of a hydrogen bonded array mediated by the two sets of donor–acceptor units on the uracil, resulting in the formation of a cyclic “rosette” containing six ruthenium
C
CHUr)][BF4] (