Direct Conversion of α-Substituted Ketones to Metallo-1,2-enedithiolates was written by Hsu, John K.;Bonangolino, Cecilia J.;Kaiwar, Sharada P.;Boggs, Christine M.;Fettinger, James C.;Pilato, Robert S.. And the article was included in Inorganic Chemistry in 1996.Application of 80480-15-5 The following contents are mentioned in the article:
A new synthetic route to metallo-1,2-enedithiolates is presented. The addition of 1 equiv of the α-bromo ketones ArC(O)CHXR (X = Br) {Ar = 2-quinoxalinyl, 2-, 3-, or 4-pyridinyl, Ph, Cl-Ph, and 1-pyrenyl (R = H); Ar = 2-quinoxalinyl (R = Me); and Ar = R = Ph} to Cp2Mo(SH)2 followed by the addition of base results in the formation of the corresponding metallo-1,2-enedithiolate Cp2Mo{η2-SC(Ar)C(R)S}. The α-tosyl ketones quinoxalinyl-C(O)CHR-O-tosyl {R = H, Me} and the α-phosphorylated ketone 3-pyridinyl-C(O)CH2-O-P(O)(OEt)2 yield the same products as the corresponding α-bromo ketones upon reaction with Cp2Mo(SH)2. The addition of acid to the heterocyclic substituted complexes yields Cp2Mo{η2-SC(HetH+)C(R)S}. Both Cp2Mo{η2-SC(2-quinoxalinyl)C(H)S}and [Cp2Mo{η2-SC(2-quinoxaliniumyl)C(H)S}][BF4] have been crystallog. characterized. Cp2Mo{η2-SC(2-quinoxalinyl)C(H)S} crystallizes in the C2/c space group with a = 21.451(2) Å, b = 15.474 Å, c = 12.2201(13) Å, and β = 107.440(7)°. [Cp2Mo{η2-SC(2-quinoxalinium)C(H)S}][BF4] crystallizes in the P1̅ space group with a = 7.4009(8) Å, b = 10.1192(13)° Å, c = 15.930(4) Å; α = 81.49(2)°, β = 76.14(2)°, and γ = 85.784°. In the solid state [Cp2Mo{η2-SC(2-quinoxaliniumyl)C(H)S}][BF4] π-stacks the heterocycle of two adjacent mols. with atom-atom distances of ≈ 3.6 Å. The stacks are limited to pairs of mols., and there is no long-range order. The pKa values for the quinoxalinium (R = H and Me) and the 2-, 3-, and 4-pyridinium (R = H) complexes have been determined in acetonitrile to be 1-3 units larger than the free heterocycles. The pKa of the pyridinium complexes follows the substitution trend 2 ≈ 4 > 3 > free pyridinium and is consistent with resonance stabilization of pyridinium by the metallo-1,2-enedithiolate. Electronic transitions in these complexes have been assigned to a LMCT transition and an ILCT transition by comparison of the various complexes accompanied with solvent sensitivity studies. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Application of 80480-15-5).
2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Application of 80480-15-5
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary