Chiral superbases: the proton affinities of 1- and 2-aza[6]helicene in the gas phase.
The proton affinities (PAs) of 1- and 2-azahelicene were determined using various mass spectrometric techniques and complementary results from density functional theory. With PAs of about 1000 kJ mol(-1), the helical backbone of both compounds offer promising perspectives for future research on enantioselective reactions of these helical nitrogen bases.
Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo Námestí 2, 16610, Praha 6, Czech Republic.
Jana
J
Roithová
Detlef
D
Schröder
Jirí
J
Mísek
Irena G
IG
Stará
Ivo
I
Starý