Search results
Results From The WOW.Com Content Network
For organic chemistry, a carbonyl group is a functional group with the formula C=O, composed of a carbon atom double-bonded to an oxygen atom, and it is divalent at the C atom. It is common to several classes of organic compounds (such as aldehydes , ketones and carboxylic acids ), as part of many larger functional groups.
Carbon suboxide, or tricarbon dioxide, is an organic, oxygen-containing chemical compound with formula C 3 O 2 and structure O=C=C=C=O. Its four cumulative double bonds make it a cumulene. It is one of the stable members of the series of linear oxocarbons O=C n =O, which also includes carbon dioxide (CO 2) and pentacarbon dioxide (C 5 O 2).
The C=O bond length in carbon dioxide is 116 pm. The C=O bonds in acyl halides have partial triple bond character and are consequently very short: 117 pm. Compounds with formal C≡O triple bonds do not exist except for carbon monoxide, which has a very short, strong bond (112.8 pm), and acylium ions, R–C≡O + (typically 110-112 pm).
Dicarbon monoxide is a product of the photolysis of carbon suboxide: [2] [3]. C 3 O 2 → CO + C 2 O. It is stable enough to observe reactions with NO and NO 2. [4]Called ketenylidene in organometallic chemistry, it is a ligand observed in metal carbonyl clusters, e.g. [OC 2 Co 3 (CO) 9] +.
The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon–oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140 pm length of a typical single C–O bond, and shorter than most other C–O multiply bonded functional groups such as carbonyls. [19]
One family of carbon oxides has the general formula C n O 2, or O=(C=) n O — namely, a linear chain of carbon atoms, capped by oxygen atoms at both ends. The first members are CO 2 or O=C=O, the well-known carbon dioxide. C 2 O 2 or O=C=C=O, the unknown and extremely unstable ethylene dione. [17]
An example of the difference is the empirical formula for glucose, which is CH 2 O (ratio 1:2:1), while its molecular formula is C 6 H 12 O 6 (number of atoms 6:12:6). For water, both formulae are H 2 O. A molecular formula provides more information about a molecule than its empirical formula, but is more difficult to establish.
Pepper spray, oleoresin capsicum spray, OC spray, capsaicin spray,mace, or capsicum spray is a lachrymator (tear gas) product containing the compound capsaicin as the active ingredient that irritates the eyes to cause burning and pain sensations, as well as temporary blindness.