Bridging ability of [bis{2,3-di(2′-pyridyl)pyrazine}platinum(II)] and [bis(2,2′-bipyrimidine)platinum(II)] moieties in polymetallic architecture

被引:1
|
作者
Kawanishi, Y
Brewer, KJ
机构
[1] Natl Inst Mat & Chem Res, Dept Polymer Chem, Tsukuba, Ibaraki 3058565, Japan
[2] Virginia Polytech Inst & State Univ, Dept Chem, Blacksburg, VA 24061 USA
来源
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2000年 / 342卷
关键词
2,2 '-bipyrimidine; 2,3-bis(2 '-pyridyl)pyrazine; ruthenium complex; platinum complex; MM2; calculation;
D O I
10.1080/10587250008038275
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Factors influencing formation of [{Ru(2,2'-bipyridine)(2)(BL)}(2)Pt](6+) complexes, where BL are 2,2'-bipyrimidine (bpm) and 2,3-bis-(2'-pyridyl)pyrazine (dpp), were discussed in terms of pi-accepting/sigma-donating properties of BL and strain energies of the complexes, sigma-Donation from BL to Pt(II) is crucial in formation of the Pt(BL)(2) type bridging moiety; pyridine provides a stronger coordination bond than pyrazine or pyrimidine, while K-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.
引用
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页码:261 / 266
页数:6
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