alkyl group


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Related to alkyl group: alkylation

alkyl group

Chemistry A functional group lacking an H+
References in periodicals archive ?
Modification of the silica colloids (siloxane and fluorinated alkyl groups) were used to drive the colloids to the air-film interface.
PMIA with unsaturated alkyl groups was reacted with thiols to examine the reactivity of the derivatives.
This suggested that the inclusion complex made of [gamma]CD and MT included a form covering the alkyl group of MT from the cavity of a wide edge of CD with respect to the alkyl group of the -CH (h) in MT.
ASCP and the PM (ASCP/UR at a molar ratio of 1/12) had peaks due to the alkyl group (-C[H.sub.2]-) of ASCP at 5664 [cm.sup.-1] and 5772 [cm.sup.-1] and a peak due to the carbonyl group (-C=O-) of ASCP at 5444 [cm.sup.-1] while UR had peaks due to in-phase vibration of N-H of UR at 6820 [cm.sup.-1] and out-phase vibration of N-H of UR at 6532 [cm.sup.-1].
The transfer of an alkyl group from a quaternary ammonium salt has been briefly mentioned in the case of 2-chlorophenothiazine [6].
Applications of viologens [1] cannot be limited to its short alkyl group substituents.
BASF has obtained a patent for a n aqueous coating formulation comprised of a substituted, branched polyethyleneimine, which is obtained by a process comprised of reacting a branched polyethyleneimine having a weight-average molecular weight of from 500 to 10,000 g/mol with a carboxylic acid derivative of formula (I) R--(C=0)X (I), wherein R is a C5 to C18 alkyl group or a C5 to C18 alkenyl group, X is a halogen, a hydroxyl group, or a group R--(C=0)--O--, a molar amount of the carboxylic acid derivative in the reacting is from 3 to 10 mol percent of a molar amount of ethyleneimine employed in preparing the branched polyethyleneimine, the reacting is comprised of formation and removal of a byproduct HX, and the formulation is configured to coat a substrate that is comprised of tannin.
As shown in Figure 1, PA, PPE, and PME were modified by changing the coil length of the substituted alkyl group (PaD-alkyls), and HPA, HPPE, and HPME were modified with the substitution of the hydroxyl group (PaD-OHs).
This means that one or more of the alkoxy groups has been replaced with a metallic species, and that the alkyl group is a methyl group.
The solid plasticizer comprises at least two different benzotriazole derivatives selected from compounds represented by following formula: R1 is one of a hydrogen atom, a halogen atom and an alkyl group; m is an integer of one to four; and X is one of a hydrogen atom, an alkyl group, an aryl group, an aralkyl group and a group represented by following formula: R2 is one of a hydrogen atom, a halogen atom, an alkyl group and hydroxyl group and n is an integer of one to five.
The modified oligodeoxynucleotide according to the invention has the sequence 5'-TxAxTxTxCxCxGxTxCxAxT-3'-O--PO.sub.2 --O--R (SEQ ID NO:1), wherein X is an internucleotide linkage of type o or s, with the proviso that x is an s linkage at least 4 times and at most 9 times, and o means a phosphodiester internucleoside linkage, s means a phosphorothioate internucleoside linkage, R means a C.sub.8 -C.sub.21 alkyl group, --(CH.sub.2 --CH.sub.2 O)n-(CH.sub.2).sub.m --CH.sub.3, or --CH.sub.2 --CH(OH)CH.sub.2 O--(CH.sub.2).sub.q --CH.sub.3 wherein n is an integer from 1 to 6, m is an integer from 0 to 20 and q is an integer from 7 to 20 and A is 2'-deoxyadenosine, G is 2'-deoxyguanosine, C is 2'-deoxycytidine and T is thymidine.
Conversely, users will also be able to "narrowly" translate generic representation to the specific groups, e.g., they can designate an alkyl group to retrieve all the specific possibilities such as methyl, ethyl, propyl, i-propyl, n-butyl etc.