ChemicalBook CAS DataBase List ETHYLENE-D4

ETHYLENE-D4 synthesis

10synthesis methods

Product Name:ETHYLENE-D4
CAS Number:683-73-8
Molecular formula:C2D4
Molecular Weight:32.08

1632-99-1
28 suppliers
$542.00/1l

683-73-8
33 suppliers
$504.99/5MG

124-38-9
131 suppliers
$175.00/23402

Yield:-

Reaction Conditions:

with nickel(II) oxide;oxygen at 450;Mechanism;Activation energy;Inert atmosphere;Reagent/catalyst;

Steps:

2.2. Isotopic studies
Experiments with deuterated ethane C₂D₆ (2% C₂D₆/He, CortecNet; 99% atom enrichment) and ethylene C₂D₄ (2% C₂D₄/He, CortecNet; 99% atom enrichment) were conducted over NiO and Ni_0.85Nb_0.15O_x in order to investigate the existence of kinetic isotope effect. For exploring ethane activation, experiments with 1% C₂D₆/1%O₂/He, 1%C₂H₆/1%O₂/He, and 0.5%C₂D₆/0.5%C₂H₆/1%O₂/He feed were carried out. Additional isothermal experiments were also conducted over both samples that involved switching from 1%C₂H₆/1%O₂/He feed to 1%C₂D₆/1%O₂/He feed. Temperature-programmed experiments with 1%C₂D₄/1%O₂/He, 1%C₂H₄/1%O₂/He, and 0.5%C₂D₄/0.5%C₂H₄/1%O₂/He feeds were conducted to study ethylene conversion pathways. The kinetic isotope effects were calculated as the ratio of normal hydrocarbon (C₂H₆ or C₂H₄) consumption rate to deuterated hydrocarbon (C₂H₆ or C₂D₄) consumption rate under identical conditions. The experimental procedure involved catalyst pretreatment under 10% O₂/He flow at 450 °C for 30 min, followed by subsequent cooling to room temperature under He flow. Finally, the temperature was raised to 450 °C at a heating rate of 10 °C/min under a total flow of 50 cm³/min of the appropriate composition. The reactor exit was monitored online by mass spectrometry (Omnistar, Balzers) by following m/z signals: 4 (He), 36 (¹⁸O₂, C₂D₆), 34 (¹⁸O¹⁶O), 32 (¹⁶O₂), 30 (C₂H₆), 24 (C₂H₄), 18 (H₂O), 44 (CO₂), 26 (C₂D₄). Overlapping fragmentation contributions of various gas compounds were taken into account.