alkylidenen.

Brit.

/alˈkɪlᵻdiːn/,

/alˈkʌɪlᵻdiːn/, U.S.

/ælˈkɪlədin/

Origin: Formed within English, by derivation. Etymons: alkyl n., -idene suffix.

Etymology: < alkyl n. + -idene suffix.

Chemistry.

A compound derived from an alkane by the replacement of two hydrogen atoms on the same carbon atom with one double-bonded atom or group; the divalent functional group =CR′R″ characteristic of such a compound. Frequently attributive.

ΚΠ

1900 Jrnl. Physical Chem. 4 325 The formation of ethers from the reaction of alkyl halids with alkalies is due to the action of the alcohol on the alkylidene radicle.

1944 Chem. Rev. 35 283 The decomposition may involve formation of alkane and alkylidene, the latter rearranging to alkene.

1977 J. March Adv. Org. Chem. (ed. 2) xvi. 819 Amides can add to aldehydes..or acids to give acylated amino alcohols, which often react further to give alkylidene or arylidene bisamides.

1990 L. Bencze in Y. İmamoǧlu et al. Olefin Metathesis & Polymerization Catalysts 233 The complex alkylidenes, RCH=W, are much preferred to the complex methylene, W=CH₂, as chain carriers in the degenerate metathesis of terminal alk-1-enes.

2003 A. Yamamoto in H. Kurosawa & A. Yamamoto Fund. Molecular Catalysis i. 3 Besides the usual π bonding, there are special types of bonding: metal-to-carbon double and triple bonds known in metal alkylidene and alkylidyne complexes.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).

单词	alkylidene
释义	alkylidenen. Brit. /alˈkɪlᵻdiːn/, /alˈkʌɪlᵻdiːn/, U.S. /ælˈkɪlədin/ Origin: Formed within English, by derivation. Etymons: alkyl n., -idene suffix. Etymology: < alkyl n. + -idene suffix. Chemistry. A compound derived from an alkane by the replacement of two hydrogen atoms on the same carbon atom with one double-bonded atom or group; the divalent functional group =CR′R″ characteristic of such a compound. Frequently attributive. ΚΠ 1900 Jrnl. Physical Chem. 4 325 The formation of ethers from the reaction of alkyl halids with alkalies is due to the action of the alcohol on the alkylidene radicle. 1944 Chem. Rev. 35 283 The decomposition may involve formation of alkane and alkylidene, the latter rearranging to alkene. 1977 J. March Adv. Org. Chem. (ed. 2) xvi. 819 Amides can add to aldehydes..or acids to give acylated amino alcohols, which often react further to give alkylidene or arylidene bisamides. 1990 L. Bencze in Y. İmamoǧlu et al. Olefin Metathesis & Polymerization Catalysts 233 The complex alkylidenes, RCH=W, are much preferred to the complex methylene, W=CH₂, as chain carriers in the degenerate metathesis of terminal alk-1-enes. 2003 A. Yamamoto in H. Kurosawa & A. Yamamoto Fund. Molecular Catalysis i. 3 Besides the usual π bonding, there are special types of bonding: metal-to-carbon double and triple bonds known in metal alkylidene and alkylidyne complexes. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < n.1900
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