1.
Angew Chem Int Ed Engl
; 37(5): 652-654, 1998 Mar 16.
Article
in English
| MEDLINE
| ID: mdl-29711067
ABSTRACT
Lewis acid and Lewis base centers are simultaneously present in the boron-bridged thiophene-containing porphyrinogen 1 that has been synthesized in high yield. Its crystal structure reveals a nonplanar macrocycle; this and the colorless aspect suggest the absence of a delocalized π-electron system. R = NiPr2 .
