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  • C terminus
  • The amino acid at the end of a peptide or protein chain that has its carboxyl group intact- that is, in which the carboxyl group is not part of a peptide bond.
  • Cahn-Ingold-Prelog notation
  • System for specifying absolute configuration as R or S on the basis of the order in which atoms or groups are attached to a chirality center. Groups ranked in order of precedence according to rules based on atomic number.

  • Carbanion
  • Anion in which the negative charge is borne by carbon. An example is acetylide ion. LINK
  • Carbanion
  • Anion in which the negative charge is borne by carbon. An example is acetylide ion. LINK
  • Carbene
  • A neutral species in which one of the carbon atoms is associated with six valence electrons.
  • Carbenoid
  • A compound, usually organometallic, that resembles a carbene in its chemical reactions
  • Carbinolamine
  • Compound of the type FIG
    FIG, Carbinolamines are formed by nucleophilic addition of an amine to a carbonyl group and are intermediates in the formation of imines and enamines.
  • Carbocation
  • Positive ion in which the charge resides on carbon. An example is tert-butyl cation, (CH3)3C+. Carbocations are unstable species that, though they cannot normally be isolated, are believed to be intermediates in certain reactions.
  • Carbocation
  • Positive ion in which the charge resides on carbon. An example is tert-butyl cation, (CH3)3C+. Carbocations are unstable species that, though they cannot normally be isolated, are believed to be intermediates in certain reactions.
  • Carbon skeleton diagram
  • Synonymous with bond-line formula (LINK)
  • Carboxylation
  • In the preparation of a carboxylic acid, the reaction of a carbanion with carbon dioxide. Typically, the carbanion source is a Grignard reagent. FIG
  • Carboxylic acid
  • Compound of the type fig also written as RCO2H
  • Carboxylic acid derivative
  • Compound that yields a carboxylic acid on hydrolysis. Carboxylic acid derivatives include acyl chlorides, acid anhydrides, esters, and amides. (LINKS)
  • Carcinogen
  • A cancer-causing substance
  • Carotenoids
  • Naturally occurring tetraterpenoid compounds found in plants and animals
  • Catalyst
  • A substance that increases the rate of a chemical reaction, but is not consumed by it
  • Cation
  • Positively charged ion
  • Cationic polymerization
  • A polymerization in which the reactive intermediates are carbocations.
  • Cellobiose
  • A disaccharide in which two glucose units are joined by a β(1,4) linkages. Bellobiose is obtained by the hydrolysis of cellulose.
  • Cellulose
  • A polysaccharide in which thousands of glucose units are joined by β(1,4) linkages.
  • Center of symmetry
  • A point in the center of a structure located so that a line drawn from it to any element of the structure, when extended an equal distance in the opposite direction, encounters an identical element. Benzene, for example, has a center of symmetry.
  • Chain reaction
  • Reaction mechanism in which a sequence of individual steps repeats itself many times, usually because a reactive intermediate consumed in one step is regenerated in a subsequent step. The halogenation of alkanes is a chain reaction proceeding via free-radical intermediates.
  • Chain termination
  • A chemical reaction that stops further growth of a polymer chain
  • Chain transfer
  • A reaction between a growing chain and a terminated chain that terminates the growing chain and activates the previously terminated chain to further growth.
  • Chain-growth polymerization
  • Macromolecule formation by a process in which monomers add sequentially to one end of a chain.
  • Chair conformation
  • The most stable conformation of cyclohexane. Fig.
  • Chair-chair interconversion
  • Synonymous with ring inversion(link) of cyclohexane and related compounds.
  • Characteristic absorption frequencies
  • The regions of the infrared (IR) spectrum where peaks characteristic of particular structural unit are normally found.
  • Chemical bond
  • A connection between atoms
  • Chemical Shift
  • A measure of how shielded the nucleus of a particular atom is. Nuclei of different atoms have different chemical shifts, and nuclei of the same atom have chemical shifts that are sensitive to their molecular environment. In proton and carbon-13 NMR, chemical shifts are cited as δ, or parts per million (ppm), from the hydrogen or carbons, respectively, of tetramethylsilane.
Department of Chemistry & Chemical Biology