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Heterocyclopolyaromatics, IX: 4,4''',6,6'''-Tetraazahexa-m-phenylene and 4,4',4''',4'''',6,6',6''',6''''-Octaazahexa-m-phenylene
Muke, Bernd,Kauffmann, Thomas
, p. 2739 - 2748 (2007/10/02)
The synthesis of the title compounds 4 and 9 is described.In contrast to hexa-m-phenylene (6) 4,4''',6,6'''-tetrazahexa-m-phenylene (4) is planar.This is explained by less Pitzer strain in the outer sphere of 4.From 4 a tetranitro derivative (7c) was obta
