Entrance of the carboxyl or sulpho groups weakens toxic action.
The connection of the cyanogen compounds with the rest of the hydrocarbons by means of carboxyl was enunciated by me, about the year 1860, at the first Annual Meeting of the Russian Naturalists.
The nature of carboxyl is directly explained by the law of substitution.
It is simplest to regard organic acids as hydrocarbons in which hydrogen has been exchanged forcarboxyl (CO{2}H), as will be explained in the following chapter.
Organic acids are the products of the carboxyl substitution in hydrocarbons.
Intimately connected with this is the fact that these fibres also exhibit partly basic and partly acid characters, due to the presence ofcarboxyl and amido groups.
In other Mordant Colours there are carboxyl (COOH) as well as hydroxyl groups, which are all-important in this respect.
OH, termed the carboxyl group, in which the hydrogen atom is replaceable by metals with the formation of salts, and by alkyl radicals with the formation of esters.
CO)2O, a molecule of water being split off between two carboxyl groups.
The basicity of an organic acid, as above defined, is determined by the number of carboxyl groups present.
In the preceding instances the carboxyl group has been synthesized or introduced into a molecule; we have now to consider syntheses from substances already containing carboxyl groups.
The simplest syntheses are undoubtedly those in which a carboxyl group is obtained directly from the oxides of carbon, carbon dioxide and carbon monoxide.
Any one of a series of cyanogen compounds; particularly, one of those cyanides of alcohol radicals which, by boiling with acids or alkalies, produce a carboxyl acid, with the elimination of the nitrogen as ammonia.
The carboxyl group constitutes another convenient starting-point for the orientation of many types of organic compounds.
Hence the positions occupied by the nitro groups in the two different nitrobrombenzoic acids must be symmetrical with respect to the carboxyl group.
Defn: Containing one carboxyl group; as, acetic acid is a monocarbonic acid.
In mineral-tanned leathers the metal is combined with carboxyl groups, while in vegetable-tanned leather the tannin is combined with the amino groups.
If, on the "chemical combination" theory, the vegetable tan combines with the amino groups and the chrome with carboxyl groups, it is natural to inquire which groups the dyestuffs combine with.
With acids, it commonly indicates that the substituent is in union with the carbon atom next to that to which the carboxyl group is attached.
The difficulty encountered by the o-position is eliminated when the carboxyl is not directly linked to the benzene nucleus, e.
In pyridine solution the carboxyl group maybe eliminated by hydrogen iodide, whereby pentoxybiphenylmethylolide is formed as long silky needles, which do not melt below 300° C.
When sulphides or mercaptans in glacial acetic acid solution are heated with permanganate, the resulting sulphonic acid compounds exhibit great similarity to compounds containing free carboxyl groups.
The substance is dissolved directly in sufficient normal alkali to neutralise the carboxyl group and a further 2 molecules of caustic soda for each carbomethoxy group to be eliminated are added.
The following mono-carboxyl acid derivatives of these phenols are, however, found both free and in glucoside formation as constituents of many of the common tannins.
When treated with alkalies, they lose their carboxyl groups and become aetioporphyrin.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "carboxyl" in a variety of sentences. We hope that you will now be able to make sentences using this word.
