tropyliumn.

Brit.

/trəʊˈpɪlɪəm/,

/trəˈpɪlɪəm/, U.S.

/troʊˈpɪliəm/,

/trəˈpɪliəm/

Origin: Formed within English, by derivation. Etymons: tropolone n., -yl suffix, -ium suffix.

Etymology: < trop- (in tropolone n.) + -yl suffix + -ium suffix.

Chemistry.

The cation C₇H₇⁺, which consists of a planar ring of seven CH groups and has aromatic character. Chiefly attributive or as a formative element in chemical names.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic ions > [noun]

carboxylate1884

sulphonium1894

oxonium1899

hexamethonium1949

lipoate1954

tropylium1954

1954 W. von E. Doering & L. H. Knox in Jrnl. Amer. Chem. Soc. 76 3204/2 Cycloheptatrienylium (tropylium) bromide is the only structural hypothesis consistent with our interpretation of the facts.

1982 T. W. G. Solomons Fund. Org. Chem. xi. 375 Tropylium bromide, C₇H₇Br, is insoluble in nonpolar solvents but dissolves readily in water.

1991 Progress Polymer Sci. 16 157 Ledwith polymerized these chiral monomers in a homogeneous system with a tropylium salt..and obtained highly isotactic, optically active polymers.

2004 Science 18 June 1776/1 Only the tropylium ion..was detected as a prominent organic line in laboratory spectra.

This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022).

单词	tropylium
释义	tropyliumn. Brit. /trəʊˈpɪlɪəm/, /trəˈpɪlɪəm/, U.S. /troʊˈpɪliəm/, /trəˈpɪliəm/ Origin: Formed within English, by derivation. Etymons: tropolone n., -yl suffix, -ium suffix. Etymology: < trop- (in tropolone n.) + -yl suffix + -ium suffix. Chemistry. The cation C₇H₇⁺, which consists of a planar ring of seven CH groups and has aromatic character. Chiefly attributive or as a formative element in chemical names. ΘΚΠ the world > matter > chemistry > organic chemistry > organic ions > [noun] carboxylate1884 sulphonium1894 oxonium1899 hexamethonium1949 lipoate1954 tropylium1954 1954 W. von E. Doering & L. H. Knox in Jrnl. Amer. Chem. Soc. 76 3204/2 Cycloheptatrienylium (tropylium) bromide is the only structural hypothesis consistent with our interpretation of the facts. 1982 T. W. G. Solomons Fund. Org. Chem. xi. 375 Tropylium bromide, C₇H₇Br, is insoluble in nonpolar solvents but dissolves readily in water. 1991 Progress Polymer Sci. 16 157 Ledwith polymerized these chiral monomers in a homogeneous system with a tropylium salt..and obtained highly isotactic, optically active polymers. 2004 Science 18 June 1776/1 Only the tropylium ion..was detected as a prominent organic line in laboratory spectra. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022). < n.1954
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