- published: 07 Nov 2013
- views: 1982
Amines are organic compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are derivatives of ammonia, wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group. Important amines include amino acids, biogenic amines, trimethylamine, and aniline; see Category:Amines for a list of amines. Inorganic derivatives of ammonia are also called amines, such as chloramine (NClH2).
Compounds with the nitrogen atom attached to a carbonyl of the structure R-C(=O)NR'R'' are called amides and have different chemical properties from amines.
Primary amines arise when one of three hydrogen atoms in ammonia is replaced by an alkyl. Important primary alkyl amines include methylamine, ethanolamine (2-aminoethanol), and the buffering agent tris. Secondary amines have two alkyl substituents bound to N together with one hydrogen. Important representatives include dimethylamine and methylethanolamine. In tertiary amines, all three hydrogen atoms are replaced by organic substituents. Examples include trimethylamine, a distinctively fishy smell. Cyclic amines are either secondary or tertiary amines. Examples of cyclic amines include the 3-member ring aziridine and the six-membered ring piperidine. N-methylpiperidine is a cyclic tertiary amine. It is also possible to have four alkyl substituents on the nitrogen. These compounds are not amines but are called quaternary ammonium cations, have a charged nitrogen center, and necessarily come with an anion.
Antar Yahia (Arabic: عنتر يحيى, born 21 March 1982) is an Algerian professional footballer who is currently playing for Bundesliga side 1. FC Kaiserslautern.
Yahia began playing football for Racing Club de Belfort before joining the Sochaux youth academy at the age of fourteen. In 2000, he moved on to Internazionale's youth academy, having failed to break into the senior squad line-up, he was loaned to Bastia, in which he made his senior debut on the 16 January 2002. Having had a successful loan spell Bastia signed him permanently.
Yahia is a former French youth international having played for both the French Under-16 and Under-18's for a small period of time during 1998 up until 2000. Yahia was the first footballer to profit from the 2004 change in FIFA eligibility rules as he had played as a French youth international. After his switch of national allegiance he was called up to the Algeria Under-23 side, scoring on his debut in a 1–0 win against Ghana in an Olympic Games qualifier on 2 January 2004. A few days later he was called up to a training camp held in Algiers in preparation of the 2004 African Nations Cup.