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 ?
The resonance structure of the decay is very different to that of D0->K^0_S pipi, which is itself the subject of an ongoing analysis within LHCb, making the two channels complementary in their physics reach.
We generally accomplish this by making subtle changes to the shape of the vowel, allowing its resonance structure to coincide more closely with the harmonic structure of the pitch we are singing.
The resonance structure of the transmission and the transmission probability are given in Section 3.2.
The traditional explanation for the carbonyl-absorptions of amides being below 1700 [cm.sup.-1] is that the lone-pair electrons on the nitrogen are delocalized into the amide carbon-nitrogen chemical bond generating a minor resonance structure with a carbon-oxygen single bond.
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.
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.
The observed carbon-oxygen and carbon-nitrogen bond lengths give evidence as to the dominant resonance structure. Paraffinic carbon-oxygen bonds typically are 1.43 [Angstrom] in length and carbon-oxygen bonds with "partial double bond character" are typically 1.36 [Angstrom] in length.
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.
Increasing the absorption can be achieved by controlling the material permittivity and permeability (electric and magnetic losses) and by using resonance structures [5].
It holds that the actual electronic structure of the molecule is a resonance hybrid of the different possible resonance structures. The paradigmatic example is benzene, which may be represented by the five irreducible resonance structures given in Scheme 1.
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.
The resonance structures typically use half-wavelength spacing, ring structures or quasi-optical techniques.