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Paramagnetic Increased-Valence Structures

All increased-valence structures that we have described in this Chapter are appropriate when an even number of electrons is present in the A-centre bonding unit. Therefore, they can be constructed for diamagnetic 5=0 spin-states- When an odd number of electrons is involved in A-centre bonding, paramagnetic increased- valence bonding units are also possible. The smallest of them pertain for 3-electron 3-centre, 5-electron 4-centre and 7-electron 5-centre bonding. They are exemplified in the increased-valence structures for (78) for CN2 and the bimolecular HO3 and ONO3 complexes that pertain for the H-1-O3 HO-i-Oj [Pg.186]

It is easy to verify that long-bond structures are not components of increased-valence structures for 3-electron 3-centre bonding units. Further discussion of increased-valence structures for 3-electron 3-centre bonding units is provided in Chapter 25, Section 2. [Pg.187]

Chapter 13 Increased-Valence Structures for A -Centre Bonding Units [Pg.188]

Huber and G. Herzberg, Molecular Spectra and Molecular Structure, Vol. 4, Constants of Diatomic Molecules (Van Nostrand, Reinhold, 1979). [Pg.188]

Nygaard, J.T. Nielsen, J. Kircheiner, G. Maltesen, J. Rastrup-Andersen and G. Sorensen, J. Mol. Struct., 3,491 (1969), and references therein. [Pg.188]

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