Isobutane is used as a refrigerant. Chromatogr. This entity has been manually annotated by the ChEBI Team. Typical products created with isobutane are 2,4-dimethylpentane and especially 2,2,4-trimethylpentane. A structural formula shows all the carbon and hydrogen atoms and the bonds attaching them. 1. isobutane. c . CAS Registry Number: 75-28-5; Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure may be viewed using Java . A molecular formula shows only the kinds and numbers of atoms in a molecule. For example, the molecular formula C4H10 tells us there are 4 carbon atoms and 10 hydrogen atoms in a molecule, but it doesnt distinguish between butane and isobutane. A substance used in a thermodynamic heat pump cycle or refrigeration cycle that undergoes a phase change from a gas to a liquid and back. Draw a line-angle structure for the compound CH3CH2CH(CH3)CH2CH2CH3. The ISOBUTANE structure data file can be imported to most of the cheminformatics software systems and applications. iodine attached to the middle carbon, the condensed formula is C6H5CH2CH3 The alkyl group with the condensed structural formula (CH3)2CH-is: a. isomethyl b. ethyl. The traditional name isobutane was still retained in the 1993 IUPAC recommendations,[22] but is no longer recommended according to the 2013 recommendations. Biol. ), 32(5), 1996, 656-666, In original 656-666. ass: Standard non-polar; Column diameter: 0.32 mm; Column length: 100 m; Column type: Capillary; Heat rate: 5 K/min; Start T: 30 C; End T: 310 C; End time: 5 min; CAS no: 75285; Active phase: OV-1; Carrier gas: Helium; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Krkosova, Z.; Kubinec, R.; Addova, G.; Jurdakova, H.; Blasko, J.; Ostrovsky, I.; Sojak, L., Gas chromatographic - mass spectrometric characterization of monomethylalkanes from fuel diesel, Petroleum & Coal, 49(3), 2007, 51-62. class: Standard non-polar; Column diameter: 0.32 mm; Column length: 60 m; Column type: Capillary; Description: -50 0C (2 min) ^ 8 0C/min -> 200 0C (7.75 min) ^ 25 0C -> 225 0C (8 min); CAS no: 75285; Active phase: Methyl Silicone; Carrier gas: Helium; Phase thickness: 1.0 um; Data type: Normal alkane RI; Authors: Blunden, J.; Aneja, V.P. Isobutane is a gas that is colourless and odourless. The condensed formulas show hydrogen atoms right next to the carbon atoms to which they are attached, as illustrated for butane: The ultimate condensed formula is a line-angle formula, in which carbon atoms are implied at the corners and ends of lines, and each carbon atom is understood to be attached to enough hydrogen atoms to give each carbon atom four bonds. Finally, on the right is the line-angle (skeletal) structure; notice that the bonds are shown, but not the carbons and not the hydrogens bonded to carbon. possible *structural formulas* which describe the way in which the This representation is a molecular formula. Gas Chromatogr., 6, 1968, 203-217. umn class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 50 ft; Column type: Packed; Start T: 86 C; CAS no: 75285; Active phase: Squalane; Carrier gas: He; Substrate: Chromosorb P; Data type: Kovats RI; Authors: Hively, R.A.; Hinton, R.E., Variation of the retention index with temperature on squalane substrates, J. For example, we can represent pentane (CH3CH2CH2CH2CH3) and isopentane [(CH3)2CHCH2CH3] as follows: Parentheses in condensed structural formulas indicate that the enclosed grouping of atoms is attached to the adjacent carbon atom. Draw the Line-Angle structure for the molecule below. 2-methylpropane is also known as isobutane or methylpropane. For example, the molecular formula C 4 H 10 tells us there are 4 carbon atoms and 10 hydrogen atoms in a molecule, but it doesn't distinguish between butane and isobutane. The ISOBUTANE molecule contains a total of 13 bond(s) There are 3 non-H bond(s). C8H18O. the carbons, 3 to the Carbon on each end, and 2 to each Carbon in The parent of the class of cyclopentanes. ; Ramsey, J.D., Volatile Substance Abuse, UNODC Technical Series, No 5, United Nations, Office on Drugs and Crime, Vienna International Centre, PO Box 500, A-1400 Vienna, Austria, 1997, 56. ass: Standard non-polar; Column diameter: 0.20 mm; Column length: 50 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 35 C; End T: 200 C; End time: 10 min; Start time: 15 min; CAS no: 75285; Active phase: PONA; Carrier gas: Nitrogen; Phase thickness: 0.50 um; Data type: Normal alkane RI; Authors: Zhang, X.; Ding, L.; Sun, Z.; Song, L.; Sun, T., Study on quantitative structure-retention relationships for hydrocarbons in FCC gasoline, Chromatographia, 70(3/4), 2009, 511-518. ass: Standard non-polar; Column type: Capillary; CAS no: 75285; Active phase: Methyl Silicone; Data type: Normal alkane RI; Authors: Spieksma, W., Determination of vapor liquid equilibrium from the Kovats retention index on dimethylsilicone using the Wilson mixing tool, J. Hi. Isobutane is also used as a propellant for aerosol spray cans. MLD 118, Revision No. In this isomer, 3 Carbons are bonded to a single Carbon atom in the center of the molecule. Such a formula does not directly tell how the various atoms are interbonded. formula of CH3CH2CH2CH3. Condensed chemical formulas show the hydrogen atoms (or other atoms or groups) right next to the carbon atoms to which they are attached. The following are suggested steps for drawing a line-angle structure (also known as a skeletal structure). Isobutane. acid is CH3COOH. Environ., 39, 2005, 6707-6718. class: Standard non-polar; Column diameter: 0.1 mm; Column length: 20 m; Column type: Capillary; Description: 40C(0.4min) =>10C/min=> 110C=>20C/min =>260C (1min); CAS no: 75285; Active phase: DB-1; Carrier gas: He; Phase thickness: 0.4 um; Data type: Normal alkane RI; Authors: LECO Corporation, Rapid qualitative GC/TOFMS analysis of unleaded gasoline, 2003. class: Standard non-polar; Column diameter: 0.25 mm; Column length: 100 m; Column type: Capillary; Description: 35 0C (13 min) ^ 10 0C/min -> 45 0C (15 min) ^ 1 0C/min -> 60 0C (15 min) ^ 1.9 0C/min -> 200 0C; CAS no: 75285; Active phase: RTX-1 PONA; Carrier gas: He; Phase thickness: 0.5 um; Data type: Normal alkane RI; Authors: Restek, Restek International, 1999 Product Guide, 1(1), 1999, 578-591, In original 578-591. class: Standard non-polar; Column diameter: 0.1 mm; Column length: 20 m; Column type: Capillary; Description: 40C(0.4min) => 10C/min =>110C =>20C/min =>260C (1min); CAS no: 75285; Active phase: DB-1; Carrier gas: He; Phase thickness: 0.4 um; Data type: Normal alkane RI; Authors: LECO Corporation, Rapid qualitative GC/TOFMS analysis of a petroleum refinery reformate standard, 2003. class: Standard non-polar; Column length: 20 ft; Column type: Packed; Description: 50C910min)=>20C/min=>90(6min)=>10C/min=>150C(hold); CAS no: 75285; Active phase: SE-30; Carrier gas: N2; Substrate: Chromosorb W; Data type: Normal alkane RI; Authors: Robinson, P.G. Condensed this would be CH_3CH_2CH_2CH_3 or just C_4H_10 Put three in a row and attach the fourth to the middle one and you get iso- butane, or officially (2-)methyl propane. 2. ; Leont'eva, S.A.; Timofeeva, A.N., Gas-chromatographic method of determination of individual hydrocarbons in catalytic cracking gasolines, in Proceedings of All-Union Research Institute on Oil Processes. A molecular formula shows only the kinds and numbers of atoms in a molecule. Line-angle formulas imply a carbon atom at the corners and ends of lines. 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III. Images of the chemical structure of ISOBUTANE are given below: The 2D chemical structure image of ISOBUTANE is also called skeletal formula, which is the standard notation for organic molecules. Heat of Vaporization at Normal Boiling Point, LogP (Octanol-Water Partition Coefficient), Ghose-Crippen Octanol-Water Partition Coefficient (logP), Moriguchi Octanol-Water Partition Coefficient (logP), Activity Score for Ion Channel Modulators, Activity Score for Nuclear Receptor Ligands, Normal Mode Frequency Analysis with Animation, Molecular Orbital (HOMO & LUMO) Visualization, quantum Chemical Computation Data (20 sets), Structure Data File (SDF/MOL File) of ISOBUTANE, 4-(hydroxyamino)-N-(5-methyl-1,2-oxazol-3-yl)benzene-1-sulfonamide, PROPANE-1,1,1,2,3,3,3-D7,2-(METHYL-D3)- (6CI,7CI,8CI,9CI). The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Stars. Draw the Lewis structure of the molecule below, showing all atoms and all valence electrons (bonds and lone pairs). Eye: Frostbite Skin: Frostbite Breathing: Respiratory support, inhalation, skin and/or eye contact (liquid), Drowsiness, narcosis, asphyxia; liquid: frostbite, Strong oxidizers (e.g., nitrates & perchlorates), chlorine, fluorine, (nickel carbonyl + oxygen), Skin: Frostbite Eyes: Frostbite Wash skin: No recommendation Remove: When wet (flammable) Change: No recommendation Provide: Frostbite wash, NIOSH REL : TWA 800 ppm (1900 mg/m 3 ) OSHA PEL ? It is an isomer of butane. 1SD, UK +44 (0)1223 49 44 44, Copyright EMBL-EBI 2018 | EBI is an outstation of the European Molecular Res. For example, we can represent pentane (CH3CH2CH2CH2CH3) and isopentane [(CH3)2CHCH2CH3] as follows: Parentheses in condensed structural formulas indicate that the enclosed grouping of atoms is attached to the adjacent carbon atom. Thus, structural formulas identify the specific isomers by showing the order of attachment of the various atoms. Molecular Formula: C 4 H 10 O or (CH 3) 2 CHCH 2 OH: Synonyms: 2-Methyl-1-propanol. -C-H HI H Condensed Structural Formula: Isobutane Isopentane Virtual Model with Extended Structural Formula . Comm., 5, 1982, 325-328. umn class: Standard non-polar; Column diameter: 0.50 mm; Column length: 150 m; Column type: Capillary; Start T: 20 C; CAS no: 75285; Active phase: OV-1; Carrier gas: He; Data type: Kovats RI; Authors: Nijs, H.H. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. , The entropies of n-butane and isobutane, with some heat capacity data for isobutane, J. Chem . Formula: C 4 H 10; Molecular weight: 58.1222; IUPAC Standard . Line-angle formulas imply a carbon atom at the corners and ends of lines. The composition of propane can be more compactly expressed as C 3 H 8. May form explosive mixtures with air. For example, the molecular formula C4H10 tells us there are 4 carbon atoms and 10 hydrogen atoms in a molecule, but it doesnt distinguish between butane and isobutane. Unfortunately, structural formulas are difficult to type/write and take up a lot of space. The outer Carbons have 3 Isobutane Molecular Formula CH Average mass 58.122 Da Monoisotopic mass 58.078251 Da ChemSpider ID 6120 More details: Names Properties Searches Spectra Vendors Articles More Names and Synonyms Database ID (s) Validated by Experts, Validated by Users, Non-Validated, Removed by Users 1730720 [Beilstein] 201-147-5 [EINECS] 270-654-1 [EINECS] II. On the left is shown the complete Lewis structure, showing all atoms and valence electrons. When compared to the conventional structural formula, it can be easily noticed that a condensed formula is less lengthy. Chromatogr., 22(10), 1999, 565-588. ass: Standard non-polar; Column type: Capillary; CAS no: 75285; Active phase: Polydimethyl siloxanes; Data type: Normal alkane RI; Authors: Yin, C.; Guo, W.; Lin, T.; Liu, S.; Fu, R.; Pan, Z.; Wang, L., Application of wavelet neural network to the prediction of gas chromatographic retention indices of alkanes, J. Chinese Chem. In this isomer, 3 Carbons are bonded to a single Carbon Because the carbons on the left are drawn straight across, we cannot see corners easily, so bend your lines (zig-zag) so that the corners are apparent. Isobutane is a colourless, odourless gas. The carbon atoms in the chemical structure of ISOBUTANE are implied to be located at the corner(s) and hydrogen atoms attached to carbon atoms are not indicated each carbon atom is considered to be associated with enough hydrogen atoms to provide the carbon atom with four bonds. A molecular formula shows only the kinds and numbers of atoms in a molecule. Please hyperlink Mol-Instincts to www.molinstincts.com. Line-angle formulas imply a carbon atom at the corners and ends of lines. Images of the chemical structure of ISOBUTANE are given below: Khim., 43, 1988, 127-135. umn class: Semi-standard non-polar; Column diameter: 0.22 mm; Column length: 50 m; Column type: Capillary; Start T: 70 C; CAS no: 75285; Active phase: Squalane; Carrier gas: He; Data type: Kovats RI; Authors: Lunskii, M.Kh. Constitutional Isomers, also known as structural isomers, are connected differently and have different bonding sequences. ; Hackett, J.; Anderson, R.R. A molecular formula shows only the kinds and numbers of atoms in a molecule. In this isomer of Butane each Carbon is The way in which the this representation is a gas that is and. Formulas identify the specific isomers by showing the order of attachment of the molecule, known... Or ( CH 3 ) 2 CHCH 2 OH: Synonyms: 2-Methyl-1-propanol all valence electrons ( bonds and pairs. Left is shown the complete Lewis structure, showing all atoms and valence electrons have! 10 O or ( CH 3 ) 2 CHCH 2 OH: Synonyms:.. 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