Dispersion Energy Enforced Dimerization of a Cyclic Disilylated Plumbylene.

By reaction of 1,4-dipotassio-1,1,4,4-tetrakis(trimethylsilyl)tetramethyltetrasilane with PbBr2 in the presence of triethylphosphine a base adduct of a cyclic disilylated plumbylene could be obtained. Phosphine abstraction with B(CF) led to formation of a base-free plumbylene dimer, which features a...

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Detalles Bibliográficos
Publicado en:	Journal of the American Chemical Society Vol. 134; no. 14; pp. 6409 - 6416
Autores principales:	Arp, Henning, Baumgartner, Judith, Marschner, Christoph, Zark, Patrick, Müller, Thomas
Formato:	Artículo
Publicado:	American Chemical Society 4/11/2012
Materias:	Dimerization Density functionals Carbenes Silylation Phosphines Energy dissipation
Acceso en línea:	Ver este registro en EBSCOhost

Descripción
Sumario:	By reaction of 1,4-dipotassio-1,1,4,4-tetrakis(trimethylsilyl)tetramethyltetrasilane with PbBr2 in the presence of triethylphosphine a base adduct of a cyclic disilylated plumbylene could be obtained. Phosphine abstraction with B(CF) led to formation of a base-free plumbylene dimer, which features an unexpected single donor-acceptor PbPb bond. The results of density functional computations at the M06-2X and B3LYP level of theory indicate that the dominating interactions which hold the plumbylene subunits together and which define its actual molecular structure are attracting van der Waals forces between the two large and polarizable plumbylene subunits.