"CO6" redirects here. For the Colchester postal district, see CO postcode area.
Carbon hexoxide or carbon hexaoxide is an oxide of carbon with an unusually large quantity of oxygen.[1] The molecule has been produced and studied at cryogenic temperatures. The molecule is important in atmospheric chemistry and in the study of cold ices in the outer solar system and interstellar space.[2] The substance could form and be present on Ganymede or Triton, moons in the outer solar system. The molecule consists of a six membered ring with five oxygen and one carbon atom, and one oxygen with a double bond with the carbon.[1]
The molecule that has been observed has a Cs symmetry. The ring is not a flat hexagon but puckered with slightly different side lengths and angles (120°) from the regular hexagon. Going around the ring starting at the carbon to oxygen bond the interatomic distances are C–O: 1.362 Å O–O 1.491 Å, O–O 1.391 Å, O–O 1.391 Å, O–O 1.491 Å, and O–C 1.362 Å. The angles between the bonds are: O–C–O 120.4 °, C–O–O 115.7°, O–O–O 105.9°, and the opposite from carbon O–O–O 104.1°. For the double carbon to oxygen bond, the length is 1.185 Å and the angle from the single bonds is 119.6°.[1]
Formationedit
In an experiment, carbon hexoxide was formed by irradiating solid carbon dioxide with electrons at an energy of 5000 eV at 10 K in a vacuum. The reaction proceeds by breaking atomic oxygen from carbon dioxide:
The atomic oxygen then reacts with carbon dioxide to form carbon trioxide, and similar reactions occur to generate the series of ring oxides carbon tetroxide and carbon pentoxide, ultimately leading to the formation of carbon hexoxide[1] in an exothermic reaction.[2]
Carbon hexoxide is stable up to 60 K.[1] Vibrational infraredwavenumbers include the most prominent ν1 = 1876 cm−1 for the most common isotopologue12C16O6.[1]
Other isomersedit
Other possible isomers of carbon hexoxide are the C2 form with a five and three membered ring, and the D2d with two four membered rings. The D2d O3CO3 isomer has a calculated C–O bond length of 1.391 Å, and an O–O length of 1.469 Å. The O–C–O bond angle is 94.1°. However these two isomers have not been observed.[2]
The equivalent carbon hexasulfide is also known from inert gas matrix study. It has C2 symmetry with the same atomic arrangement as the hexoxide.[3]
Referencesedit
^ abcdefJamieson, Corey S.; Alexander M. Mebel; Ralf I. Kaiser (2008). "First detection of the Cs symmetric isomer of carbon hexaoxide (CO6) at 10 K". Chemical Physics Letters. 450 (4–6): 312–317. Bibcode:2008CPL...450..312J. doi:10.1016/j.cplett.2007.11.052. ISSN 0009-2614.
^ abcdKaiser, Ralf I.; Alexander M. Mebel (2008). "On the formation of higher carbon oxides in extreme environments". Chemical Physics Letters. 465 (1–3): 1–9. Bibcode:2008CPL...465....1K. doi:10.1016/j.cplett.2008.07.076. ISSN 0009-2614.
^Maity, Surajit; Kim, Y.S.; Kaiser, Ralf I.; Lin, Hong Mao; Sun, Bian Jian; Chang, A.H.H. (July 2013). "On the detection of higher order carbon sulfides (CSx; x = 4–6) in low temperature carbon disulfide ices". Chemical Physics Letters. 577: 42–47. Bibcode:2013CPL...577...42M. doi:10.1016/j.cplett.2013.05.039.
April 13, 2024
carbon, hexoxide, redirects, here, colchester, postal, district, postcode, area, carbon, hexaoxide, oxide, carbon, with, unusually, large, quantity, oxygen, molecule, been, produced, studied, cryogenic, temperatures, molecule, important, atmospheric, chemistry. CO6 redirects here For the Colchester postal district see CO postcode area Carbon hexoxide or carbon hexaoxide is an oxide of carbon with an unusually large quantity of oxygen 1 The molecule has been produced and studied at cryogenic temperatures The molecule is important in atmospheric chemistry and in the study of cold ices in the outer solar system and interstellar space 2 The substance could form and be present on Ganymede or Triton moons in the outer solar system The molecule consists of a six membered ring with five oxygen and one carbon atom and one oxygen with a double bond with the carbon 1 Carbon hexoxide NamesIUPAC name pentaoxan 6 oneIdentifiersCAS Number 1009636 22 93D model JSmol Interactive imagePubChem CID 18694685InChI InChI 1S CO6 c2 1 3 5 7 6 4 1Key UMNKSLFSKMBRFI UHFFFAOYSA NSMILES O C1OOOOO1PropertiesChemical formula CO6Molar mass 108 005 g mol 1Related compoundsRelated compounds Carbon pentoxideCarbon tetroxideCarbon hexasulfideExcept where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox references Contents 1 Shape 2 Formation 3 Properties 4 Other isomers 5 ReferencesShape editThe molecule that has been observed has a Cs symmetry The ring is not a flat hexagon but puckered with slightly different side lengths and angles 120 from the regular hexagon Going around the ring starting at the carbon to oxygen bond the interatomic distances are C O 1 362 A O O 1 491 A O O 1 391 A O O 1 391 A O O 1 491 A and O C 1 362 A The angles between the bonds are O C O 120 4 C O O 115 7 O O O 105 9 and the opposite from carbon O O O 104 1 For the double carbon to oxygen bond the length is 1 185 A and the angle from the single bonds is 119 6 1 Formation editIn an experiment carbon hexoxide was formed by irradiating solid carbon dioxide with electrons at an energy of 5000 eV at 10 K in a vacuum The reaction proceeds by breaking atomic oxygen from carbon dioxide CO2 CO OThe atomic oxygen then reacts with carbon dioxide to form carbon trioxide and similar reactions occur to generate the series of ring oxides carbon tetroxide and carbon pentoxide ultimately leading to the formation of carbon hexoxide 1 in an exothermic reaction 2 CO2 O O2CO O2CO O O3CO O3CO O O4CO O4CO O O5CO DH 145 2 kJ mol 1 2 Properties editCarbon hexoxide is stable up to 60 K 1 Vibrational infrared wavenumbers include the most prominent n1 1876 cm 1 for the most common isotopologue 12C16O6 1 Other isomers editOther possible isomers of carbon hexoxide are the C2 form with a five and three membered ring and the D2d with two four membered rings The D2d O3CO3 isomer has a calculated C O bond length of 1 391 A and an O O length of 1 469 A The O C O bond angle is 94 1 However these two isomers have not been observed 2 The equivalent carbon hexasulfide is also known from inert gas matrix study It has C2 symmetry with the same atomic arrangement as the hexoxide 3 References edit a b c d e f Jamieson Corey S Alexander M Mebel Ralf I Kaiser 2008 First detection of the Cs symmetric isomer of carbon hexaoxide CO6 at 10 K Chemical Physics Letters 450 4 6 312 317 Bibcode 2008CPL 450 312J doi 10 1016 j cplett 2007 11 052 ISSN 0009 2614 a b c d Kaiser Ralf I Alexander M Mebel 2008 On the formation of higher carbon oxides in extreme environments Chemical Physics Letters 465 1 3 1 9 Bibcode 2008CPL 465 1K doi 10 1016 j cplett 2008 07 076 ISSN 0009 2614 Maity Surajit Kim Y S Kaiser Ralf I Lin Hong Mao Sun Bian Jian Chang A H H July 2013 On the detection of higher order carbon sulfides CSx x 4 6 in low temperature carbon disulfide ices Chemical Physics Letters 577 42 47 Bibcode 2013CPL 577 42M doi 10 1016 j cplett 2013 05 039 Retrieved from https en wikipedia org w index php title Carbon hexoxide amp oldid 1119183406, wikipedia, wiki, book, books, library,
