title: Expectation and surprise in group 13 organometallics: molecular vs. polymeric aggregation of Me2Ga and Me2In norcamphor oximates.
abstract: Whereas (meso)-[(norcamphor oximato)GaMe2]2 exhibits the dimeric M2O2N2 motif favoured by organo group 13 metal oximates, the Me2In derivative [{(meso)-[(norcamphor oximato)InMe2]2}2]infinity aggregates distinctly different with the In atoms adopting coordination number (CN)=5; compound is the first oximato-based chain-like coordination polymer in group 13 organometallics; it comprises alternating M2O2N2 and M2O2 ring dimers interconnected via two types of a fifth dative bond (O-->In and N-->In) to yield the new {M4O4N4}infinity motif; the calculated energetics of the heteroatom rings involved in and confirm the diverging aggregational behaviour of Ga and In.
authors.affiliation: Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstr. 30, 48149, Münster, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Ullrich
authors.forename: Raphael J F
authors.initials: RJ
authors.lastname: Berger
authors.forename: Tania
authors.initials: T
authors.lastname: Pape
authors.forename: Norbert W
authors.initials: NW
authors.lastname: Mitzel