title: Germanium phthalocyanine, GePc, and the reduced complexes SiPc(pyridine)(2) and GePc(pyridine)(2) containing antiaromatic pi-electron circuits.
abstract: The reaction of GeCl2(dioxane) with K2Pc(DMF)4 yields germanium phthalocyanine, GePc. GePc dissolves in pyridine to form GePc(py)2. The 1H NMR spectrum of GePc(py)2 and nucleus-independent chemical shift (NICS) calculations on GePc(NMe3)2 both show the presence of a strong paratropic ring current. That ring current, along with the bond-length alternation in the crystal structure of GePc(tBuPy)2, indicates the presence of an antiaromatic pi-electron circuit in GePc(py)2. SiPc(py)2 was synthesized, and its electronic structure is similar to that of GePc(py)2.
authors: Department of Chemistry and Center for Materials Innovation, Washington University, St. Louis, Missouri 63130, USA.
authors: Julie A
authors: JA
authors: Cissell
authors: Thomas P
authors: TP
authors: Vaid
authors: Antonio G
authors: AG
authors: Dipasquale
authors: Arnold L
authors: AL
authors: Rheingold