Bridging Ability of [Bis{2,3-di(2′-pyridyl)pyrazine}platinum(II)] and [Bis(2,2′-bipyrimidine)platinum(II)] Moieties in Polymetallic Architecture
作者:
Yuji Kawanishi,
KarenJ. Brewer,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 342,
issue 1
页码: 261-266
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008038275
出版商: Taylor & Francis Group
关键词: 2,2′-bipyrimidine;2,3-bis(2′-pyridyl)pyrazine;ruthenium complex;platinum complex;MM2 calculation
数据来源: Taylor
摘要:
Factors influencing formation of [{Ru(2,2′-bipyridine)2(BL)}2Pt]6+complexes, where BL are 2,2′-bipyrimidine (bpm) and 2,3-bis-(2′-pyridyl)pyrazine (dpp), were discussed in terms of π-accepting/[sgrave]-donating properties of BL and strain energies of the complexes. [sgrave]-Donation from BL to Pt(II) is crucial in formation of the Pt(BL)2type bridging moiety; pyridine provides a stronger coordination bond than pyrazine or pyrimidine, while π-back donation seems less favored. Shifts in redox potentials suggest intramolecular Ru(II) to Pt(II) charge flow through BL. Adaptable conformation is also essential in the BL structure to reduce strain upon bridging two coordination cores. High bridging ability of dpp in the polymetallic synthesis is indicated.
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