Reactions of the Tetraalkyldigallium Compound R2Ga–GaR2 [R = CH(SiMe3)2] with Acidic Reagents, Retention vs. Cleavage of the Ga–Ga Bond and Formation of Supramolecular Aggregates via Hydrogen Bonding

Uhl, Werner; Voß, Matthias; Hepp, Alexander

doi:10.1002/zaac.201100252

Cited by 3 publications

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“…Each metal–metal bond is bridged by a carboxylato group and a chelating dinitrogen ligand. The Ga–N distances to the neutral nitrogen atoms of the pyridine analogous aromatic rings are similar in both compounds and reflect, with bond lengths of 2.080 (av) ( 4 ) and 2.085 (av) Å ( 5 ), characteristic values of N→Ga donor–acceptor interactions . In contrast, considerable differences resulted for the Ga–N bond lengths including the negatively charged amido nitrogen atoms.…”

Section: Resultsmentioning

confidence: 85%

Gallium–Gallium Bonds As Effective Templates for the Generation of Macrocycles and Supramolecular Entities

et al. 2012

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Treatment of the tetraalkyldigallium(4) compound R 2 Ga−GaR 2 [1; R = CH(SiMe 3 ) 2 ] with the highly functionalized acids 3-and 4-carboxyphenylthiourea, 7azaindole-3-carboxylic acid, and 6-aminonicotinic acid afforded macrocyclic compounds in which two or four Ga−Ga bonds are bridged by the respective number of organic spacer ligands. In each reaction two equivalents of CH 2 (SiMe 3 ) 2 per formula unit of 1 were released. The Ga−Ga bonds of the products 2 to 5 are bridged by a carboxylato group and a chelating ligand containing two nitrogen donor atoms or the sulfur and nitrogen atoms of a thiourea group. The thiourea derivatives afforded different species with four or eight gallium atoms in the heterocycles (2 and 3) depending on their substitution patterns (1,3-versus 1,4-positions at the benzene rings). Supramolecular aggregates resulted that had up to 12 THF molecules encapsulated in the heterocycles or bonded to the surface of the molecules via hydrogen bonding or orthogonal dipolar interactions.

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Section: Resultsmentioning

confidence: 85%