Synthesis, characterization and crystal structures of monocyclopalladated and biscyclopalladated 1,1′-bisferrocenylpyrimidine–monophosphine complexes
摘要:
A new 1,1'-bisferrocenylpyrimidine ligand [{(eta(5)-C5H4)-N2C4H-2CH(3)}(2)Fe] 1 was conveniently prepared via the coupling reaction of 1,1'-dichloromercuriferrocene and 4,6-dimethyl-2-iodopyrimidine, and its monophosphine-palladacycle complexes 2-3 were also readily obtained from the cyclopalladation reactions and bridge-splitting reactions. These compounds have been characterized by H-1 NMR, IR, ESI-MS, and elemental analysis. The complex 2 was found to be a biscyclopalladated complex, while the complex 3 was a monocyclopalladated complex. Additionally, their detailed structures have been determined by X-ray single-crystal diffraction. The most striking common feature of the structures of 2-3 is intermolecular C-H center dot center dot center dot Cl hydrogen bonds, which are attributed to construct the 1D chain structures. (C) 2010 Elsevier B.V. All rights reserved.
Synthesis, characterization and crystal structures of monocyclopalladated and biscyclopalladated 1,1′-bisferrocenylpyrimidine–monophosphine complexes
摘要:
A new 1,1'-bisferrocenylpyrimidine ligand [{(eta(5)-C5H4)-N2C4H-2CH(3)}(2)Fe] 1 was conveniently prepared via the coupling reaction of 1,1'-dichloromercuriferrocene and 4,6-dimethyl-2-iodopyrimidine, and its monophosphine-palladacycle complexes 2-3 were also readily obtained from the cyclopalladation reactions and bridge-splitting reactions. These compounds have been characterized by H-1 NMR, IR, ESI-MS, and elemental analysis. The complex 2 was found to be a biscyclopalladated complex, while the complex 3 was a monocyclopalladated complex. Additionally, their detailed structures have been determined by X-ray single-crystal diffraction. The most striking common feature of the structures of 2-3 is intermolecular C-H center dot center dot center dot Cl hydrogen bonds, which are attributed to construct the 1D chain structures. (C) 2010 Elsevier B.V. All rights reserved.