Models for intramolecular exchange in organic. pi.-conjugated open-shell systems: a comparison of three non-Kekule biphenyldinitrenes

M Minato, PM Lahti, H van Willigen

Index: Minato, Masaki; Lahti, Paul M.; Van Willigen, Hans Journal of the American Chemical Society, 1993 , vol. 115, # 11 p. 4532 - 4539

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Citation Number: 45

Abstract

Abstract: The important effect of connectivity upon the nature of intramolecular exchange coupling of unpaired electrons by the biphenyl group was investigated by cryogenic matrix photolysis of diazide precursors expected to yield biphenyl-3, 4'-dinitrene (l), biphenyL3, 3'- dinitrene@), and biphenyL4, 4'-dinitrene (3). System 1 was predicted by parity-based qualitative models to exhibit a high-spin ground state. By Curie law analysis of its electron ...

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