pyrrole

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Related to pyrrolic: pyridine

pyrrole

 [pir´ōl]
a basic, cyclic substance, obtained by destructive distillation of various animal substances.

pyr·role

(pir'ōl),
Divinylenimine; a heterocyclic compound found in many biologically important substances, for example, heme.
Synonym(s): azole, imidole

pyrrole

(pîr′ōl′)
n.
1. A five-membered heterocyclic ring compound, C4H5N, having an odor similar to chloroform, that is the parent compound of protoporphyrin.
2. Any of various derivatives of this compound.

pyr·ro′lic (pĭ-rō′lĭk) adj.

pyr·role

(pir'ōl)
A heterocyclic compound found in many biologically important substances.
Synonym(s): azole, imidole.

pyrrole

a porphyrin building block that has a five-membered heterocyclic structure and contains nitrogen.
References in periodicals archive ?
Peak Binding Assignment Element Fraction of energy (eV) composition species (%) (at.%) C 1s 284.9 [Sp.sup.2] C-C 58.3 286.2 [Sp.sup.3] C-C, C-N 23.1 287.6 -C=O, C=N 80.22 8.8 288.8 O=C-O 6.9 290.4 O=C-OH 2.9 O 1s 530.9 C=O 30.0 532.0 O-C-O 9.98 34.4 533.1 O-C=O 29.1 534.4 Amide 6.5 N 1s 398.7 Pyridinic N (N-6) 43.4 400.1 Pyrrolic N (N-5) 9.47 36.8 401.2 Quaternary N (N-Q) 19.8 S 2p 163.9 Thiophenic (C-S-C) 3/2 0.15 57.4 164.9 Thiophenic (C-S-C) 1/2 42.6 Table 2: Photovoltaic parameters and EIS resistances of different counter electrodes.
The analysis of azole 7 coordination with magnesium ions proved that the pyrrolic nitrogen NH with a labile exchangeable proton is the principal position in this interaction [8].
One synthetic method conjugated the pyrrolic unit with chloroacetyl chloride generating a chlorinated dipyrrin that was converted to the respective BODIPY using TEA and [BF.sub.3].O[Et.sub.2] [44].
Further changes evidence an increment in the resonance interaction between phenyl and pyrrolic rings followed by a slight projection out of the molecular plane of the compound [54].
Identifiable peaks were observed for aliphatic C[H.sub.2] and C[H.sub.3] stretch, carbonyl and carboxyl stretch, pyrrolic NH stretch and sulphoxide stretch.
Bjoroy; Fractionation of pyrrolic nitrogen compounds in petroleum during migration: derivation of migration-related geochemical parameters, The geochemistry of reservoirs, Geological Society Special Publications: 86, 103-123 (1995)
and Frolov Y.B.: "Adsorptive interaction between nitrogen compounds and organic and/or mineral phases in subsurface rocks as model for composition fractionation of pyrrolic nitrogen compounds in petroleum during petroleum migration".
In 1997, she joined The University of British Columbia to work with David Dolphin, FCIC, on the investigation of self-assembly processes involving pyrrolic molecules, first as a post-doctoral fellow and than as a research assistant.
As heteroatoms other than oxygen are concentrated into the composition of acetone solubles, the presence of pyrrolic, pyranic, sulphoxidic, metallorganic, letcitinic and other phospholipidic, tioketonic, tioalcoholic, tioureatic, amidic, and many other fragments containing one or more heteroatoms in the form of remnants, substitutes, derivation or recombination products in this fraction is probable.
The main peak in the [sup.15]N NMR spectrum of coal was assigned to pyrrolic N compounds.