• alkyl
  • 4. The pressure-sensitive adhesive composition as claimed in claim 2 or 3 , wherein the monomers A are selected from the group consisting of the acrylates CH 2 ═CHCOOR, methacrylates CH 2 ═C(CH 3 )COOR and combinations thereof, in which the groups R are alkyl radicals having from 4 to 14 carbon atoms. (google.com)
  • 6. The process of claim 1 wherein R 1 is methyl and R 2 is an alkyl radical of about 1 to about 6 carbon atoms. (google.com)
  • An alkyl group, generally abbreviated with the symbol R, is a functional group that, like an alkane, consists solely of single-bonded carbon and hydrogen atoms connected acyclically-for example, a methyl or ethyl group. (wikipedia.org)
  • cycloalkanes
  • Besides this standard definition by the International Union of Pure and Applied Chemistry, in some authors' usage the term alkane is applied to any saturated hydrocarbon, including those that are either monocyclic (i.e. the cycloalkanes) or polycyclic. (wikipedia.org)
  • catalytic
  • In the case of the tip-growth model, hydrocarbon decomposes on the top surface of the metal, carbon diffuses down through the metal, and CNT precipitates out across the metal bottom, pushing the whole metal particle off the substrate, and continues to grow until the metal is fully covered with excess carbon and its catalytic activity ceases. (wikipedia.org)
  • decomposition
  • In addition to the elimination-type pathways described, cycloalkynes can also be obtained through the oxidation of cyclic bis-hydrozones with mercury oxide as well as through the thermal decomposition of selenadiazole. (wikipedia.org)
  • In the case of the base-growth model, the initial hydrocarbon decomposition and carbon diffusion take place similar to that in the tip-growth case, but the CNT precipitation emerges out from the metal particle's apex and forms a hemispherical dome, which then extends up in the form of seamless graphitic cylinder. (wikipedia.org)
  • Subsequent hydrocarbon decomposition takes place on the lower peripheral surface of the metal, and as-dissolved carbon diffuses upward. (wikipedia.org)
  • covalent
  • Like a single covalent bond, double bonds can be described in terms of overlapping atomic orbitals, except that, unlike a single bond (which consists of a single sigma bond), a carbon-carbon double bond consists of one sigma bond and one pi bond. (wikipedia.org)
  • Because carbon has 4 electrons in its outermost shell (and because each covalent bond requires a donation of 1 electron, per atom, to the bond) carbon has exactly four bonds to make, and is only stable if all 4 of these bonds are used. (wikipedia.org)
  • In terms of shells, carbon consists of an incomplete outer shell, which comprises 4 electrons, and thus has 4 electrons available for covalent or dative bonding. (wikipedia.org)
  • Saturated hydrocarbons are hydrocarbons having only single covalent bonds between their carbons. (wikipedia.org)
  • Chiral
  • As given in the example of 3-methylhexane and its higher homologues, branched hydrocarbons can be chiral. (wikipedia.org)
  • Chiral saturated hydrocarbons constitute the side chains of biomolecules such as chlorophyll and tocopherol. (wikipedia.org)
  • For example, 3-methylhexane and its higher homologues are chiral due to their stereogenic center at carbon atom number 3. (wikipedia.org)
  • bonds
  • Analysis by photoelectron spectroscopy has indicated that the alkyne bond in small cyclic systems is composed of two non-degenerate π bonds - a highly reactive strained bond perpendicular to a lower-energy π bond. (wikipedia.org)
  • Each carbon of the double bond uses its three sp2 hybrid orbitals to form sigma bonds to three atoms (the other carbon and two hydrogen atoms). (wikipedia.org)
  • In an alkane, each carbon atom has 4 bonds (either C-C or C-H), and each hydrogen atom is joined to one of the carbon atoms (so in a C-H bond). (wikipedia.org)
  • atom
  • Hydrocarbons, from which one hydrogen atom has been removed, are functional groups called hydrocarbyls. (wikipedia.org)
  • In simple chemistry, as per valence bond theory, the carbon atom must follow the "4-hydrogen rule", which states that the maximum number of atoms available to bond with carbon is equal to the number of electrons that are attracted into the outer shell of carbon. (wikipedia.org)
  • Similarly to heptafulvene (fulvene containing a 7-atom cyclic ring), triafulvene polymerizes easily at −20°C and is stabilized by electron-accepting groups bonded to the exocyclic carbon atom. (wikipedia.org)
  • The electronegativity of Mn (1.55) is comparable to that of Mg (1.31) and Zn (1.65) making the carbon atom (EN = 2,55) nucleophilic. (wikipedia.org)
  • alkyne
  • Because of the linear nature of the C-C≡C-C alkyne unit, cycloalkynes can be highly strained and can only exist when the number of carbon atoms in the ring is great enough to provide the flexibility necessary to accommodate this geometry. (wikipedia.org)
  • Due to the activated nature of the cyclic carbon-carbon triple bond, many alkyne addition-type reactions such as the Diels-Alder, 1,3-dipolar cycloadditions and halogenation may be performed using very mild conditions and in the absence of the catalysts frequently required to accelerate the transformation in a non-cyclic system. (wikipedia.org)
  • wherein
  • 4. The process of claim 3, wherein said continuous polymerization process is a slurry process and a hydrocarbon in which said elastomer is substantially insoluble is employed in an amount and under a pressure sufficient to allow utilization of said hydrocarbon in liquified form as a polymerization diluent. (google.com)
  • 3) wherein the carbon backbone is linked so as to form a loop. (wikipedia.org)
  • electrons
  • all the p orbitals overlap leading to two rings of delocalised electrons one above and one below the plane of the carbon. (studystack.com)
  • This ability comes from the fact that the bond character between carbon atoms is entirely non-polar, in that the distribution of electrons between the two elements is somewhat even due to the same electronegativity values of the elements (~0.30), and does not result in the formation of an electrophile. (wikipedia.org)
  • catalyst
  • In the CVD process, a hot carbonaceous gas decomposes, *leaving carbon to diffuses into or around the catalyst particles*, and then nucleates a graphitic nanotube sidewall at one crystallographic face of the catalyst. (wikipedia.org)
  • The catalyst enables the pyrolysis of carbon and subsequent growth of VANTA. (wikipedia.org)
  • in the presence of a palladium coupling catalyst for promoting carbon-nitrogen bond-forming cross-coupling. (google.com)
  • structures
  • furthermore, as opposed to pentafulvene, one of the triafulvene resonance structures has a negative charge on the exocyclic carbon. (wikipedia.org)
  • ketones
  • Organomanganese halides react with aldehydes and ketones to the alcohol, with carbon dioxide to the carboxylic acid (tolerating higher operating temperature than corresponding RLi or RMgBr counterparts), sulfur dioxide and isocyanates behaving like soft Grignard reagents. (wikipedia.org)
  • species
  • Cyclopropatriene is a hypothetical allotrope of carbon that was once proposed as a candidate for a spectroscopically observed tricarbon species. (wikipedia.org)
  • typically
  • Catalysts are typically metals that have high carbon solubility at high temperatures and that exhibit a high carbon diffusion rate, such as iron (Fe), cobalt (Co), and nickel (Ni). (wikipedia.org)