lone pair


Also found in: Encyclopedia, Wikipedia.

lone pair

n
(Chemistry) chem a pair of valency electrons of opposite spin that are not shared between the atoms in a molecule and are responsible for the formation of coordinate bonds
References in periodicals archive ?
MAHESH Bhupathi on Friday launched an unprecedented attack on his former doubles teammate Leander Paes, saying he had " publicly and privately stabbed me in the back", soon after the national selectors picked him and Paes as India's lone pair for the Olympics.
Absorption peak at 312 nm is commonly found in the raw material, TTIP, which maybe assigned to transition from lone pair of oxygen atom to unoccupied levels of Ti atom.
The technique uses the Lewis acid tris(pentafluorophenyl) borane and the Lewis base tetramethylpiperidine that have been modified to be too large to get close enough to form an adduct (Lewis bases, which carry a lone pair of electrons, can bond with Lewis acids to form molecules called adducts).
The procedure is based on molecules called Lewis bases, which carry a lone pair of electrons and can bond with so-called Lewis acids to make a molecule called an adduct.
The two electrons left over form a lone pair that makes this species highly reactive--reactive enough to attack C[O.
STRAWBERRIES, rain, white sportswear and a weight of expectation on a lone pair of British shoulders - it can only mean one thing.
M is a multivalent heteroatom having at least one lone pair of electrons selected from oxygen, nitrogen and sulfur, directly attached to the light emitting moiety of Lumi at one end and to P at the other end.
0 release sees many new features and improvements such as template based structure cleaning, 3D editing, lone pair support and an attached data function to annotate atoms with user defined data.
Next time, he'll bring more pairs of his size 15 basketball shoes; the lone pair he brought last time didn't stand up to concrete spillage and the heavy rain that fell each afternoon.
The mid-race downpour, though, seemed to have spurred the bunch if anything into re-invigorating the pursuit of the leaders and, by lap four, the gap was beginning to come down, although with still no real organised chase, it began to look increasingly likely that the lone pair would stay away.
The fluorescent color that appears under the UV light is affected by the negative charge on the sulfate group for cellulose sulfate or, for methyl cellulose, by the lone pair of electrons on the methoxyl group.
The lone pair of rakish lavender overpants were being sported by a gentleman in his late fifties who was almost certainly a retired quantity surveyor and weekday member of a second-rate golf club.