The preparation, characterization, and some properties of the C 2 Co 2 cluster-bridged bipyridine ligand (4-C 5 H 4 N) 2 C 2 Co 2 (CO) 6 ( 1 ), diphosphine-chelated Pd(II)/Pt(II) complexes [M(dppb)(H 2 O) 2 ][OTf] 2 (dppb = 1,4-bis(diphenylphosphino)butane, OTf = SO 3 CF 3; 2, M = Pd; 3, M = Pt), and the unique cationic cluster-containing Pd(II)/Pt(II) macrocycles {[M(dppb)]-μ-[(4-C 5 H 4 N) 2 C 2 Co 2 (CO) 6 ]} 2 [OTf] 4 ( 4, M = Pd; 5, M = Pt) and {[M(dpab)]-μ-[(4-C 5 H 4 N) 2 C 2 Co 2 (CO) 6 ]} 2 [OTf] 4 (dpab = 1,4-bis(diphenylarsino)butane; 6, M = Pd; 7, M = Pt) are reported. While ligand 1 is prepared by reaction of bis(4-pyridyl)acetylene with Co 2 (CO) 8 in 61% yield, complexes 2 and 3 are prepared by reaction of M(dppb)Cl 2 with silver triflate followed by hydrolysis of the intermediates M(dppb)(OTf) 2 in 96% and 94% yields, respectively. Particularly interesting is that the self-assembly of ligand 1 with 2 and 3 results in formation of the C 2 Co 2 cluster-containing macrocycles 4 and 5 in 62% and 65% yields, whereas 6 and 7 can be produced by self-assembly of 1 with diarsine-chelated complexes [Pd(dpab)(H 2 O)(OTf)][OTf] and [Pt(dpab)(H 2 O) 2 ][OTf] 2 in 79% and 68% yields, respectively. 1 − 7 have been fully characterized by elemental analysis, spectroscopy, and particularly for 2 − 7 X-ray crystallography, and for 1, 4, and 7 by cyclic voltammetric techniques.
No takes yet. Share an insight, caveat, or question.
Song et al. (2005) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: