Charge and electron transfer from metal-to-carbon bonds of Main Group organometallics MRn (M = Al, Ga, Zn) to aromatic N-heterocycles: Colored precursor compounds and radical complex formation. Inorganica Chimica Acta, (225)1-2:23--34, 1994. [PUMA: Group reaction charge metal gallium bond organometallic organometallic;Main transfer organometallic;heterocycle aluminum carbon zinc]