Oxidative Transformation of a Tetrathia S-Confused Isophlorin into Porphyrin Cation
作者:Santosh P. Panchal、Venkataramanarao G. Anand
DOI:10.1021/acs.orglett.7b02317
日期:2017.9.15
properties of first generation S-confused isophlorins are described. Despite structural resemblance to a confused porphyrin, spectroscopic and computational studies reveal weak paratropic ring current effects in these 20π macrocycles. They display redox properties atypical of parent tetrathia isophlorins. Experimental evidence supports the oxidation of an unstable 19π neutral radical, as a transient intermediate
π-Conjugated macrocycles from thiophenes and benzenes
作者:J. Sreedhar Reddy、Venkataramanarao G. Anand
DOI:10.1039/b715553k
日期:——
Ï-Conjugated macrocycles consisting of thiophenes and benzenes exhibit benzenoid features for 4nÏ macrocycles, whereas (4n + 2)Ï macrocycles are annulenoid due to rapid interconversion between quinoid and Kekule canonical forms in the benzene units.
作者:Rakesh Gaur、Madan D. Ambhore、Venkataramanarao G. Anand
DOI:10.1142/s1088424619501050
日期:2020.1
is crucial to the structural and electronicproperties of isophlorin and its expanded derivatives. Herein we describe the effect of benzene ring substitution in a 32π expanded isophlorin core, which is at the crossroads of hexaphyrin and octaphyrin. Synthesis, structural characterization and electronicproperties of a non-planar 32π core-modified expanded isophlorin resembles that of a hexaphyrin like
Reversible Redox Reaction Between Antiaromatic and Aromatic States of 32π-Expanded Isophlorins
作者:Tullimilli Y. Gopalakrishna、Venkataramanarao G. Anand
DOI:10.1002/anie.201403372
日期:2014.6.23
32π‐antiaromatic expanded isophlorins with a varying number of thiophene and furan rings adopt either planar, ring‐inverted, or twisted conformations depending on the number of furan rings in the macrocycle. However, they exhibit identical reactivity with respect to their oxidation to aromatic 30π‐dicationic species under acidic conditions. These 32π‐antiaromatic macrocycles can also be oxidized with
Antiaromatic Supramolecules: F⋅⋅⋅S, F⋅⋅⋅Se, and F⋅⋅⋅π Intermolecular Interactions in 32 π Expanded Isophlorins
作者:Tullimilli Y. Gopalakrishna、J. Sreedhar Reddy、Venkataramanarao G. Anand
DOI:10.1002/anie.201207987
日期:2013.2.4
Count against: Stable and planar antiaromatic, expanded vinylogous isophlorins encourage chalcogen–fluorine noncovalent interactions. The wide cavity of the macrocycle accommodates covalently bound fluorine substituents, thus leading to multiple nonbonding interactions