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Supramolecular Interactions of Group VI Metal Carbonyl Complexes: The Facilitating Role of 1,3-Bis( p-isocyanophenyl)urea.
Inorg Chem ; 58(12): 8130-8139, 2019 Jun 17.
Artigo em Inglês | MEDLINE | ID: mdl-31124666
ABSTRACT
An investigation of supramolecular phenomena involving zerovalent transition metal complexes was facilitated by the production of the ditopic isocyanide ligand 1,3-bis( p-isocyanophenyl)urea, which was synthesized via substoichiometric phosgenation of 4-isocyanophenylamine and used to coordinate group VI metal carbonyl fragments. The resulting binuclear organometallic complexes were observed to pack into ladder-like anisotropic arrays in the solid state. Crystallographic and computational evidence suggests that this packing motif can be attributed to a combination of intermolecular π-π and urea-π interactions. Similar to other N, N'-diarylureas bearing electron-withdrawing groups, 1,3-bis( p-isocyanophenyl)urea and the organometallic complexes prepared therefrom also exhibit an affinity toward anion binding in nonaqueous solution. Equilibrium constants ( K) for the formation of host-guest complexes between the organometallic derivatives of 1,3-bis( p-isocyanophenyl)urea and chloride, nitrate, and acetate anions exceed 103, 104, and 105 M-1, respectively.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Inorg Chem Ano de publicação: 2019 Tipo de documento: Artigo País de afiliação: Estados Unidos