295357-86-7

Upstream product

• 295357-84-5 trans-bis(1,2-bis(dimethylphosphino)ethane)chloro(mesitylcarbyne)tungsten 
• 16940-66-2 sodium tetrahydroborate 
• 942439-96-5 trans-[WH(1,2-bis(dimethylphosphino)ethane-d12)(2,4,6-trimethylphenylcarbyne)] 
• 295357-85-6 trans-(η1-HBH3)(1,2-bis(dimethylphosphino)ethane)2(mesitylcarbyne)tungsten 

Downstream Products

• 295357-90-3 trans-(1,2-bis(dimethylphosphino)ethane)2(η1-OCH(CH3)2)(mesitylcarbyne)tungsten 
• 942439-99-8 trans-[WH(1,2-bis(dimethylphosphino)ethane)(2,3,5-trimethylphenylcarbyne-d1)] 
• 295357-88-9 trans-(1,2-bis(dimethylphosphino)ethane)2(η1-OC3H7)(mesitylcarbyne)tungsten 
• 295357-89-0 trans-(1,2-bis(dimethylphosphino)ethane)2(η1-OCH2C6H5)(mesitylcarbyne)tungsten 
• 295357-91-4 trans-(1,2-bis(dimethylphosphino)ethane)2(η1-1-phenylethoxy)(mesitylcarbyne)tungsten 
• 295357-93-6 trans-(1,2-bis(dimethylphosphino)ethane)2(η1-(pyrid-2-yl)methoxy)(mesitylcarbyne)tungsten 
• 295357-92-5 trans-(1,2-bis(dimethylphosphino)ethane)2(η1-diphenylmethoxy)(mesitylcarbyne)tungsten 
• 354581-97-8 trans-W((μ-OCH)[Re2(CO)9])(Cmesityl)(1,2-bis(dimethylphosphanylethane))2 
• 295357-94-7 trans-bis(1,2-bis(dimethylphosphino)ethane)(η1-4-formylphenoxy)(mesitylcarbyne)tungsten 
• 1333-74-0 hydrogen 
• 295357-87-8 trans-bis(1,2-bis(dimethylphosphino)ethane)(mesitylcarbyne)(η1-formate)tungsten 
• 942439-98-7 trans-[WH(1,2-bis(dimethylphosphino)ethane)(2,3,5-trimethylphenylcarbyne)] 

Relevant academic research and scientific papers

trans-W(Cmesityl)(dmpe)2H: Revealing a highly polar W-H bond and H-mobility in liquid and solid state

The isotopomeric complexes trans-W(Cmesityl)[(C(H,D)3) 2PCH2CH2P(C(H,D)3)2] 2(H,D) 1 -4 were prepared. 2 (W(CmeSityl)(dmpe) 2D) was used to study the Deuterium Quadrupole Coupling Constant (DQCC) and the ionicity of the W-D bond (DQCC = 34.1 kHz; ionicity 85%). 1 (W(Cmesityl)(dmpe)2H) shows several dynamic exchange processes in solution, such as Hw/Hw, H w/ortho-Memesityl, and Hw/H2 exchanges observed by NMR in combination with deuterium labeling studies and double label crossover experiments. Except for the Hw/H2, these reactions comprise elementary steps, which also appear along the isomerization pathway of 1 into (2,3,5-trimethylphenylcarbyne)(dmpe) 2WH (5) at 60 °C. 5 was characterized by an X-ray diffraction study. In the solid state only an Hw/Mep exchange process prevails appearing at higher temperatures, which was identified by NMR and by Quasielastic Neutron Scattering. The latter also provided an activation barrier of 5 kcal/mol and a jump width for the moving H nucleus in agreement with the HW...Mep distance of the X-ray diffraction study of 1.

1,2-Bis(dimethylphosphino)ethanehydridomesitylidyne-tungsten(IV). Hydride activation via the trans influence

The synthesis of the tungsten carbyne hydride complex trans-W(CMes)(dmpe)2H, 7, which is obtained from the borohydride complex trans-W(CMes)(η1-BH4)(dmpe)2, 6, (dmpe = Me2-PCH2CH2PMe2) is reported. 6 is readily prepared from trans-W(CMes)(dmpe)2d, 5, which is prepared from [W(CO)5C(O)Mes][N(CH3)4] via the isolable intermediates trans-W(CMes)-(CO)2(Py)2Cl, 2, and trans-W(CMes)(CO)[P(OMe)3]3Cl, 3. 7 was spectroscopically fully characterized, and reactivity studies have revealed its potential in hydrogen transfer reactions. The results of studies into the reactivity of the W-H bond toward small unsaturated molecules, such as propionaldehyde, benzaldehyde, acetone, acetophenone, and benzophenone, to give the corresponding alkoxides trans-W(CMes)(dmpe)2(OCHR′R″) (R′ = H, R″ = Pr 9, R′ = H, R″ = Ph 10, R′ = R″ = Me 11, R′ = Me, R″ = Ph 12, R′ = R″ - Ph 13) are presented. Facile insertion of the C=O moiety into the W-H bond was also observed with CO2 to yield the formato-O-complex trans-W(CMes)(dmpe)2(OCHO), 8. Reaction of 7 with pyridine-2-carbaldehyde yields the insertion product trans-W(CMes)(η1-methoxypyridine)(dmpe)2, 14, but only at temperatures below 0°C. 14 decomposes within minutes at room temperature. Treating 7 with 4-hydroxybenzaldehyde affords trans-W(CMes)(η1-4-formylphenoxy)(dmpe)2, 15, via a simple acid-base reaction with concomitant evolution of H2.