246. Molecular compound formation in the polyphenyl series. Part I. Some compounds formed by 4 : 4′-dinitrodiphenyl

Rapsōn, W. S.; Saunder, D. H.; Stewart, Erica

doi:10.1039/jr9460001110

Cited by 15 publications

(5 citation statements)

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“…In picrate (134) and other nitroaromatic (33,206) complexes the nitro asymmetric stretching mode and the out-of-plane CH bending mode are sensitive to complexing. The manner in which these modal fundamentals are changed in intensity and/or in frequency has been used as a criterion of complex type for picrates (134).…”

Section: B the Acceptor Spectrummentioning

confidence: 99%

Energetics Of Molecular Complexes

McGlynn¹

1958

Chem. Rev.

184

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In general A or D may7 be molecules, molecule-ions, or atom-ions, but with the restriction that they7 are both in their totally symmetric ground states. With these restrictions the principal contributing term in the wave function of the ground state of the complex, 0 itself is the wave function corresponding to a structure for the complex in which the binding of the two components is effected by classical intermolecular forces such as dipoledipole, ion-dipole, dipole-induced dipole interactions, etc., by7 hydrogen bonding, or by perturbation effects of higher order such as London forces. 0 is denoted the no-bond wave function. , the dative-bond wave function, corresponds to a structure of the complex in which an electron has transferred from the donor to the acceptor, and in which, besides all the forces listed above as operative in the structure corresponding to , there may also be weak chemical binding between the odd electrons now situated on the two components of the complex. If A and D are both neutral species, ion-ion attractive forces may account for a large part of the binding energy of the dative structure.If the donor is a weak base and the acceptor a weak acid, then frequently a third term, representing electron transfer from the acceptor to the donor, may

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Section: B the Acceptor Spectrummentioning

confidence: 99%

Energetics Of Molecular Complexes

McGlynn¹

1958

Chem. Rev.

184

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show abstract

“…C. Multi-ring compounds as donors Rapson, Saunder, and Stewart (258) have observed that the donor-acceptor ratio in aromatic complexes is usually 1:1 unless two or more structurally independent coordination sites are present in the donor molecule. In the stilbenes (321) and diphenylpolyenes (188), which form 1:2 complexes with s-trinitrobenzene, the two benzene rings probably function as separate coordination centers.…”

Section: B Polymethylbenzenes and Alkylbenzenes As Donorsmentioning

confidence: 99%

“…Various aspects of Weiss's argument have received unfavorable criticism (78,258). The heats of formation are, for example, of much lower magnitude than is ordinarily found for processes of salt formation.…”

Section: E the Concept Of Complex Resonancementioning

confidence: 99%