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Crystal Structures of the Supramolecular Aggregates of the Methyl and Chloro Substituted Gallanes Mex

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Crystal Structures of the Supramolecular Aggregates of the Methyl and Chloro Substituted Gallanes Me

x

GaCl

3-x

Christian Lustig and Norbert W. Mitzel

Institut f¨ur Anorganische und Analytische Chemie, Westf¨alische Wilhelms-Universit¨at M¨unster, Corrensstr. 30, D-48149 M¨unster, Germany

Reprint requests to Prof. Dr. N. W. Mitzel. Fax: (+49)251 83 36007. E-mail: Mitzel@uni-muenster.de Z. Naturforsch. 59b, 140 – 147 (2004); received December 15, 2003

Dedicated to Professor Ingo-Peter Lorenz on the occasion of his 60thbirthday

The crystal structures of the complete series of compounds of the general formula MexGaCl3−x

have been determined. New polymorphs of GaCl3and MeGaCl2were found. All chloro compounds MexGaCl3−x(x=0,1,2) are dimers with Ga2Cl2four-membered rings. (GaCl3)2and (MeGaCl2)2

are aggregated into layers with the same aggregation motif (each molecule connected to four neigh- bouring molecules), (Me2GaCl)2is associated in a ladder-like structure (each molecule connected to two neighbouring molecules), GaMe3 forms weakly Ga···C bound pseudo-tetramers aggregated into layers by further Ga···C contacts (each molecule has two shorter Ga···C’ and C···Ga’ and two weaker Ga···C’ and C···Ga’ contacts).

Key words: Gallium, Crystal Structure, Supramolecular Chemistry, Aggregation

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