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Isolation and X-Ray Characterization of {[Phthalazinium](CuCl2

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Isolation and X-Ray Characterization of {[Phthalazinium](CuCl

2

)}

: ANew Example of a Dichlorocuprate(I) Presenting a Rare Staircase Chain Structure

Laurent Plasseraud, H´el`ene Cattey, and Philippe Richard

Institut de Chimie Mol´eculaire de l’Universit´e de Bourgogne (ICMUB), UMR CNRS 5260, UFR Sciences et Techniques, 9 all´ee A. Savary, BP 47870, 21078 DIJON Cedex, France Reprint requests to Dr. L. Plasseraud. Fax: +33 (0)3 80 39 60 98.

E-mail: Laurent.Plasseraud@u-bourgogne.fr

Z. Naturforsch.2010,65b,317 – 322; received November 12, 2009

Dedicated to Professor Rolf W. Saalfrank on the occasion of his 70thbirthday

Air-sensitive complexes [Cu2(µ-phtz)3(PR3)2][CF3SO3]2(phtz = C8H6N2),3(R = phenyl) and 4(R = benzyl) have been synthesized from{[Cu(CF3SO3)]2·C6H5Me}(1) at room temperature, in acetonitrile solution, after successive additions of stoichiometric amounts of phthalazine (phtz) and triphenylphosphine and tribenzylphosphine, respectively. The dissolution of4in an excess of benzyl chloride gave rise to the slow formation of orange needles, characterized by an X-ray crystallographic analysis as the title compound,{[phthalazinium](CuCl2)}(5). The solid-state structure of5can be described as a one-dimensional anionic chain, [(CuCl2)], presenting a rare staircase shape with terminal chloride ligands. The negative charges are compensated by monoprotonated phthalazinium cations [phtzH]+which are stacked throughπ-πinteractions between N-heterocyclic rings, and are also in N-H hydrogen bonding interaction with the terminal chloride ligands of the anionic chain.

The formation of5was unexpected and can be explained by the dechlorination of benzyl chloride molecules.

Key words:Copper(I), Phthalazine Ligand, Organic-Inorganic Hybride Compound, Non-coordinating Interactions, Crystal Structure

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