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Donor−Acceptor Heteroleptic Open Sandwiches

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Facultad de Química, Universidad de Guanajuato, Noria Alta s/n CP 36050, Guanajuato, Guanajuato, México, Instituto de Química, UNAM, Circuito Exterior, Universidad Nacional Autónoma de México, Coyoacán, CP 04510 México, D.F. México, and Departamento de Química, Centro de Investigación y de Estudios Avanzados, AP 14−740, México 07000, D.F. México
Cite this: Inorg. Chem. 2006, 45, 3, 1091–1095
Publication Date (Web):January 4, 2006
Copyright © 2006 American Chemical Society

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    A series of donor−acceptor heteroleptic open sandwiches with formula CpM−M‘Pyl (M = B, Al, Ga; M‘ = Li, Na; Cp = cyclopentadienyl; Pyl = pentadienyl) has been designed in silico using density functional theory. The most stable complexes are those containing boron as a donor atom. A molecular orbital analysis shows that the s character of the lone pair located at the group 13 element is mainly responsible for the complex stabilization. It is also found that the surrounding medium has a similar effect on these sandwiches such as in the “classical” donor−acceptor complexes, showing a decrement in the group 13 element−alkaline metal bond lengths.

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     To whom correspondence should be addressed. E-mail:  gmerino@

     Universidad de Guanajuato.

     Universidad Nacional Autónoma de México.


     Centro de Investigación y de Estudios Avanzados.

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    The xyz coordinates for donor−acceptor heteroleptic open sandwiches and the MO of CpM fragments. This material is available free of charge via the Internet at

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