leaving group


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leaving group

[′lēv·iŋ ‚grüp]
(organic chemistry)
The group of charged or uncharged atoms that departs during a substitution or displacement reaction. Also known as nucleofuge.
References in periodicals archive ?
Manchester United failed to seal their place in the last 16 of the Champions League when they were held to a 0-0 draw by PSV Eindhoven at Old Trafford on Wednesday, leaving Group B wide open before the final round of matches next month.
Both nations created chances at Soccer City, including two in the first five minutes, but failed to convert them, leaving Group A blank after 180 minutes.
This creates strong adhesion between silicone and the substrate, yet (1) acetic acid can corrode electronics and (2) the leaving group causes mass loss and shrinkage.
Rachel Yankey doubled the tally midway through the second half, leaving group B runners-up Japan looking thoroughly outclassed.
8%, leaving group sales down 4% - despite more resilient trading at Darty France.
8%, leaving group sales down 4%, despite resilient trading in France.
And that disappointment was amplified by Croatia's 2-1 comefrom-behind home victory against Macedonia, leaving Group E still wide open, with five nations still in the running for qualification.
2 -macroglobulin, wherein said sample is contacted with a substrate comprising a molecule of sufficient size coupled to a signal-substrate, said signal-substrate comprising a detectable leaving group, wherein said substrate is hydrolysed by said proteolytic enzyme but not by said complex.
1]-[alpha] where [pi] is a leaving group or an addition group, [R.
The slower ground - and therefore greater emphasis on stamina - may help compensate to some extent, but Chantaco is 3lb higher than at Newmarket, leaving Group Captain on a more attractive mark.
The assay compound includes a leaving group and an indicator group.
But the pains outweighed the gains leaving group profits for the six months to October pounds 4.