2680-00-4

Usage

InChI:InChI=1/C2H4/c1-2/h1-2H2/i1D

Upstream product

• 1521-56-8 3,3,6,6-d4-cyclohexene 
• 115-10-6 Dimethyl ether 
• 27847-12-7 2,2-dideuterio-butylamine 
• 78087-12-4 1(R),2(R)-dideuteriocyclobutane 
• 93604-58-1 C⁽²⁾H₂Co⁽¹⁺⁾ 
• 115-11-7 isobutene 
• 74-86-2 acetylene 
• 123-75-1 pyrrolidine 
• 212625-79-1 pyrrolidine-d9 
• 1517-53-9 (E)-ethene-1,2-d2 
• 1070-74-2 acetylene-d2 
• 74-85-1 ethene 
• 13183-67-0 n-butane-1,1,1,4,4,4-d₆ 
• 13183-68-1 2-methylpropane-2-d1 

Downstream Products

• 74-85-1 ethene 
• 76936-98-6 deuteriocyclopropane 

Relevant academic research and scientific papers

Collisional Energy Transfer in the Two-Channel Thermal Unimolecular Reaction of Bromoethane-2-d

Unimolecular thermal decomposition in the two-channel bromoethane-2-d system was studied over the temperature range of 660-706 K in the presence of CF4 and He bath gases.The C2H5Br system was also studied as a reference process.The average energy removed per collision from energized bromoethane-2-d by a bath gas down is as follows: by the substrate, 1100 cm-1 (stepladder model); by CF4, 675 cm-1 (exponential model, EXP); by He, 215 cm-1 (EXP).Comparison is made with recent studies of direct measurements.The relative rate ratio of two-channel reaction has been expressed in terms of microscopic rate ratio and distribution function of the reacting molecule.Arrhenius parameters, i.e., log A and Ea (kcal/mol), at ca. 50 Torr of total pressure were found to be as follows: for C2H5Br, 13.37 +/- 0.18, 53.36 +/- 0.55; for CH2DCH2Br, 13.16 +/- 0.16 and 53.30 +/- 0.51 (HBr elimination) and 12.83 +/- 0.30 and 54.29 +/- 0.92 (DBr elimination).

ACTIVATION OF ENCAPSULATION SYSTEM MoO3SnO2 FOR OLEFIN METATHESIS BY SnMe3.

Inactive MoO//3/SnO//2 was changed to a metathesis catalyst by treating the surface with tetramethyltin (SnMe//4) at room temperature. On the catalyst olefin metathesis proceeded selectively without accompanying side reactions such as hydrogen scrambling. During the treatment of MoO//3/SnO//2 with SnMe//4, a small amount of methane formed concurrent with decomposition of SnMe//4. Decomposition of tetraethyltin (SnEt//4) also occurred in MoO//3/SnO//2; however, the surface showed no metathesis activity. From these results, it was concluded that the cause for activation of MoO//3/SnO//2 by SnMe//4 is attributed not to reduction of Mo species or the presence of Sn but to the formation of CH//2 species pivotal to the catalytic olefin metathesis cycle.

Gold(I) Carbenoids: On-Demand Access to Gold(I) Carbenes in Solution

Chloromethylgold(I) complexes of phosphine, phosphite, and N-heterocyclic carbene ligands are easily synthesized by reaction of trimethylsilyldiazomethane with the corresponding gold chloride precursors. Activation of these gold(I) carbenoids with a variety of chloride scavengers promotes reactivity typical of metallocarbenes in solution, namely homocoupling to ethylene, olefin cyclopropanation, and Buchner ring expansion of benzene.

Inorganic clusters with a [Fe2MoOS3] core - A functional model for acetylene reduction by nitrogenases

We report the first example of a wholly inorganic mimic of a part of the FeMoco active centre of nitrogenases. We detail the synthesis, characterisation and reactivity of two related, transient hydride-containing inorganic clusters, a dihydride complex and a vinyl monohydride complex, which bear the [Fe2MoOS3] portion of FeMoco. The dihydride complex is capable of reducing acetylene to ethylene via the vinyl monohydride complex. In the reaction cycle, a transient low-valent complex was generated by the reductive elimination of H2 or ethylene from dihydride or vinyl monohydride complexes, respectively.

The first ruthenium-silsesquioxyl complexes-synthesis, structure and mechanistic implications in silylative coupling

The first ruthenium-silsesquioxyl complexes have been synthesised and characterized via spectroscopic and X-ray methods. Mechanistic studies were performed and the complexes obtained were proved to be intermediates in the catalytic cycle of silylative coupling of olefins with vinylsilsesquioxane. Moreover, a mechanism for silylative coupling of styrene with vinylsilsesquioxanes was proposed. This journal is the Partner Organisations 2014.

Decomposition of 1,1-dimethyl-1-silacyclobutane on a tungsten filament - Evidence of both ring C-C and ring Si-C bond cleavages

The decomposition of 1,1-dimethyl-1-silacyclobutane (DMSCB) on a heated tungsten filament has been studied using vacuum ultraviolet laser single photon ionization time-of-flight mass spectrometry. It is found that the decomposition of DMSCB on the W filament to form ethene and 1,1-dimethylsilene is a catalytic process. In addition, two other decomposition channels exist to produce methyl radicals via the Si-CH3 bond cleavage and to form propene (or cyclopropane)/dimethylsilylene. It has been demonstrated that both the formation of ethene and that of propene are stepwise processes initiated by the cleavage of a ring C-C bond and a ring Si-C bond, respectively, to form diradical intermediates, followed by the breaking of the remaining central bonds in the diradicals. The formation of ethene via an initial cleavage of a ring C-C bond is dominant over that of propene via an initial cleavage of a ring Si-C bond. When the collision-free condition is voided, secondary reactions in the gas-phase produce various methyl-substituted 1,3-disilacyclobutane molecules. The dominant of all is found to be 1,1,3,3-tetramethyl-1,3-disilacyclobutane originated from the dimerization of 1,1-dimethylsilene. Copyright

Efficient functionalisation of cubic monovinylsilsesquioxanes via cross-metathesis and silylative coupling with olefins in the presence of ruthenium complexes

Monovinylheptaisobutylsilsesquioxane undergoes efficient cross-metathesis and silylative coupling with styrenes. Allyl derivatives were successfully tested in cross-metathesis in the presence of first generation Grubbs' catalyst, while heteroatom-substitu

Thermal chemistry of bicyclo[4.2.0]oct-2-enes

At 300 °C, bicyclo[4.2.0]oct-2-ene (1) isomerizes to bicyclo[2.2.2]oct-2-ene (2) via a formal [1,3] sigmatropic carbon migration. Deuterium labels at C7 and C8 were employed to probe for two-centered stereomutation resulting from C1-C6 cleavage and for one-centered Stereomutation resulting from C1-C8 cleavage, respectively. In addition, deuterium labeling allowed for the elucidation of the stereochemical preference of the [1,3] migration of 1 to 2. The two possible [1,3] carbon shift outcomes reflect a slight preference for migration with inversion rather than retention of stereochemistry; the si/sr product ratio is ～1.4. One-centered stereomutation is the dominant process in the thermal manifold of 1, with lesser amounts of fragmentation and [1,3] carbon migration processes being observed. All of these observations are consistent with a long-lived, conformationally promiscuous diradical intermediate.

The effect of substituents at silicon on the cross-metathesis of trisubstituted vinylsilanes with olefins

Efficient cross-metathesis of vinylsilanes, carrying a large spectrum of different substituents at silicon, with various olefins in the presence of the first and second generation Grubbs catalyst and Hoveyda-Grubbs catalyst is described. On the basis of the results of equimolar reactions of vinylsilanes with ruthenium alkylidene complexes and experiments with deuterium-labelled reagents, a general, metallacarbene mechanism for the cross-metathesis of trisubstituted vinylsilanes with olefins has been suggested. Reaction was proved to be a valuable method for synthesis of unsaturated organosilicon derivatives.

Reaction of Hydrogen Peroxide with Organosilanes under Chemical Vapour Deposition Conditions

When a stream of vapour at low pressure which contained a mixture of H2O2 with an organosilane, RSiH3 (R = alkyl or alkenyl), impinged on a silicon wafer, deposition of oxide films of nominal composition RxSiO(2-0.5x), where x 3 or higher alkenyl groups. or higher alkenylgroups. Possible mechanism for the Si-C bond cleavage reaction are discussed, with energetic rearrangement of radical intermediates of type Si(H)(R)(OOH)' being favoured.