isobutyl


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isobutyl

[¦ī·sō′byüd·əl]
(organic chemistry)
The radical (CH3)2CHCH2‒, occurring, for example, in isobutanol (isobutyl alcohol), (CH3)2CHCH2OH.
References in periodicals archive ?
The developed method is based on ion pair extraction with bis(2-ethylhexyl) phosphate (BEHPA) and derivatization with isobutyl chloroformate (IBCF).
[sup.1]H NMR (400 MHz, CD[Cl.sub.3], S): 7.35 (1H, d, J = 17 Hz, -CO-CH=), 7.84 (1H, d, J = 17 Hz, =CH-Ar), 7.05-7.95 (8H, Ar-H), 0.91 (6H, d, J = 8 Hz, -[(C[H.sub.3]).sub.2]), 2.10-2.13 (1H, m, -CH-), 2.33 (2H, d, J = 8 Hz, -C[H.sub.2]-); [sup.13]C NMR (100 MHz, CD[Cl.sub.3]): d 190.22 (C-1), 123.68 (C-2), 147.56 (C-3), 133.13 (C-2' and C-6'), 131.58 (C-3' and C-5'), 137.02 (C-1'), 148.31 (C-4'), 142.41 (C-1"), 152.32 (C-4"), 128.23 (C-2" and C-6"), 122.11 (C-3" and C-5"), 22.18 (-C[H.sub.3], C of isobutyl group at C-47), 28.98 (-CH-, C of isobutyl group at C-47) and 43.87 (-C[H.sub.2]-, C of isobutyl group at C-47); MS (m/z, %): 310.3 (M + 1, 99.38); Anal.
Monodisperse polystyrene microspheres have been prepared by emulsion copolymerization using hexyl acrylate (HA), ethylhexyl acrylate (EHA), isooctyl acrylate (IOA), butyl acrylate (BA), or isobutyl acrylate (IBA) as comonomers.
Delayed harvest date increased ethyl butyrate, isobutyl alcohol, linalool, terpinolene and citronellol, and decreases were noted for hexyl acetate, octanoic acid, hexanoic acid, ethyl caprylate and (3-damascenone in both years.
AIBuPOSS (MA0701), which has one acryl group and seven isobutyl groups on each Si of the POSS cage, and OIBuPOSS (MS0825) which has isobutyl groups on every Si corner of the POSS cage, were purchased from Hybrid Plastics Co.
The synthesized epoxy resin was examined in coating compositions incorporating different acrylic resins [poly(isobutyl methacrylate), poly(methyl methacrylate-co-ethyl acrylate), poly(methyl methacrylateco-butyl methacrylate), or poly(methyl methacrylate)].
Model apple juice samples were prepared by the researchers who used three concentrations of sucrose and fructose, and two concentrations of glucose, with a fixed concentration of six characteristic apple aroma-flavor compounds, including isobutyl acetate, hexanal, butyl acetate, trans-2-hexenal, propyl butyrate and hexyl acetate.
In soap and liquid soap: Triclocarban and Triclosan In toothpaste: Triclosan In moisturizers: Retinyl palmitate or retinolin In shampoo and conditioner: Fragrance, PEG, ceteareth and polyethylene, DMDM hydantoin and various types of parabens: propyl, isopropyl, butyl, isobutyl In lip products: Retinyl palmitate or retinol In nail products: Formaldehyde or formalin, Toluene, Dibutyl phthalate (DBP) EWG suggests avoiding certain "problem products" completely.
Identification and quantification was based on external calibration with standard solutions of acetaldehyde, 2-pentanone, 2-butanone, ethylacetate (Fluka, Buchs SG, Switzerland); ethanol (Arcus, Oslo, Norway); 2-methyl-1-propanol, 2-methyl-1-butanol, 2-methyl-1-butanal, 3-methyl-1-butanol, 2-methyl-1-butanol, 2-methyl-1-propanol, 3-methyl-1-butanal, 3-methyl-1-butanol, 2-methyl-1-butanol, 2-methyl-1-propanal, diacetyl, 2-propanol, 1- butanol, 2-butanol, acetoin, iso-butylacetate, acetone, 2,3-pentanedione, ethylacetate, acetone, isobutyl acetate and ethyl butyrate (Merck KGaA, Darmstadt, Germany).
The Saudi team used the technology to obtain Methyl Isobutyl Ketone (MIBK), whose applications are used in industrial, medical and petroleum fields.
Chemical studies carried out on Brazilian Piperaceae species have revealed the occurrence of pyrones, lignoids and chromenes besides various amides bearing isobutyl, pyrrolidine, dihydropyridone and piperidine moieties (Parmar et al.