resonance structure

resonance structure

[′rez·ən·əns ‚strək·chər]
(organic chemistry)
Any of two or more possible structures of the same compound that have identical geometry but different arrangements of their paired electrons; none of the structures has physical reality or adequately accounts for the properties of the compound, which exists as an intermediate form.
References in periodicals archive ?
This observation has been explained by the lone pair electrons on the nitrogen being delocalized into the amide carbon-nitrogen chemical bond generating a minor resonance structure with a carbon-oxygen single bond.
A resonance structure model of formamide interacting with nanoparticles and the resulting impact of the nanoparticle bonding on the formamide carbonyl infrared absorption is shown in Fig.
Based on the above discussion, in this article, a compact printed antenna with a parallel resonance structure for penta-band WWAN tablet computer application is presented.
After add the parallel resonance structure to form Ref.
For band-notched UWB PMAs, the bandstop function is achieved by introducing a coupling resonance structure that can be represented by an additional RLC resonator.
We finally projected the wave function calculated in the first step to the calculated local wave function and evaluated each resonance structure portion by coefficients resulted in the previous steps," he added.
Summary: TEHRAN (FNA)- The Iranian researchers at Yasouj University in collaboration with their colleagues at Shiraz University managed to identify the resonance structures of carbon nanotubes and estimate the reactivity of these compounds.
While resonance structure 1 (Figure 9) most likely is the principle structure describing the observed structure of the 3-nitrophenolate ion, the experimental C6-Ol and C4-N1 bond lengths give evidence that structures 2, 3, and 4 (Figure 9) also significantly contribute to the structure that is observed.
The paradigmatic example is benzene, which may be represented by the five irreducible resonance structures given in Scheme 1.
The resonance structures typically use half-wavelength spacing, ring structures or quasi-optical techniques.