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The Concentration Control of Magnetic Fullerene C60*- Radical Anions in a Crystal Lattice of the (Bu4N+)2{(C60*-)·C6H4Cl2}x{[CpMo(CO)2C60]}2-x (x=1, 0.74) Complexesстатья
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Дата последнего поиска статьи во внешних источниках: 26 января 2018 г.
- Авторы: Konarev D.V., Khasanov S.S., Troyanov S.I., Otsuka A., Yamochi H., Kitagawa H., Lyubovskaya R.N.
- Журнал: ChemistrySelect
- Том: 2
- Год издания: 2017
- Первая страница: 6640
- Последняя страница: 6644
- DOI: 10.1002/slct.201701083
- Аннотация: Interaction of the (Bu4N+)(C60*-) salt with {CpMo(CO)3}2 at a different molar ratio allows one to obtain isostructural (Bu4N+)2{(C60*-)·C6H4Cl2}x{[CpMo(CO)2C60]-}2-x complexes with x=1(1) and 0.74 (2). The complexes contain the solvated C60*- radical anions and the coordination [CpMo(CO)2C60]- anions which share one position in the crystal structure with different occupancies. Molybdenum atom coordinates by the h2-type to the 6–6 bond of C60 in the [CpMo(CO)2(h2-C60)]- anions. The length of the MoC(C60) bonds is 2.241(6)-2.244(6) A˚ . Optical spectrum of 1 supports the presence of uncoordinated C60*- and neutral coordinated C60 in [CpMo(CO)2(h2-C60)-. Paramagnetism of C60*- in 1 provides effective magnetic moment of 1.2 mB whereas coordination [CpMo(CO)2(h2-C60)]- anions are diamagnetic and EPR silent. Fullerenes form closely packed double ribbons with triangular fullerene lattice. 1 shows antiferromagnetic coupling of spins with a small Weiss temperature of -7 K. That can be explained by magnetic dilution of paramagnetic C60*- species by diamagnetic [CpMo(CO)2(h2-C60)]- anions.
- Добавил в систему: Троянов Сергей Игоревич