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Triruthenium and triosmium carbonyl cluster complexes containing deprotonated di(2-pyridyl)amine in unusual coordination modes
The synthesis of the first trinuclear carbonyl clusters containing ligands derived from di(2-pyridyl)amine (Hdpa) has been achieved. Treatment of [Ru3-(CO)12] or [Ru3(CO)10(MeCN)2] with di(2-pyridyl)amine (Hdpa) gives the cluster complex [Ru3(mu-H)(mu-eta3-dpa-C,N,N)(CO)9] (1). The dpa ligand in this compound chelates a Ru atom through both pyridinic nitrogens while attached to another Ru atom through the C atom of a metalated pyridine ring, keeping the amino NH fragment uncoordinated. Curiously, the osmium compounds [Os3(mu-H)(mu-eta2-dpa-N,N)(CO)10] (2) and [Os3(mu-H)(mu3-eta2-dpa-N,N)(CO)9 ] (3), which have been stepwise prepared from [Os3(CO)10(MeCN)2] and Hdpa, contain edge-bridging (2) and face-capping (3) N-deprotonated dpa ligands coordinated through the N atom of a pyridine ring and the N atom of the original amino fragment.
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Reference£º
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics