The title mol-ecule, C(10)H(6)O(4)Se(2), lies on a twofold rotation axis. The Se-Se bond length of 2.305 (3) Å is similar to that in diphenyl diselenide [2.3066 (7) and 2.3073 (10) Å for the P and M isomers, respectively] and longer than that in 1,8-diseleno-naph-thalene [2.0879 (8) Å]. The mol-ecule adopts a gauche conformation with respect to the C=O groups.

Doped graphene could be of use in next-generation electronic and photonic devices. However, chemical doping cannot precisely controlled the material leads to external disorder that diminishes carrier mobility conductivity. Here we show can efficiently doped using a monolayer tungsten oxyselenide (TOS) is created by oxidizing diselenide. When TOS direct contact with graphene, room-temperature 2,...

C14H10O2Se2 is monoclinic, P2(1)/c. The unit-cell dimensions at 293 K are a = 12.795(2), b = 12.126(2), c = 9.0179(13)A, beta = 107.074(6)degrees, V = 1337.5(3)A3, and Z = 4. The R value is 0.048 for 2319 observed reflections. The dihedral angle between the plane C4-C7(O2)-Se1 and C9-C8(O1)-Se2 is 85.6(2)degrees, keeping the Se atom unshared electron pairs in a more stable configuration with th...

The electrical and magnetic properties were measured on polycrystalline samples of niobium diselenide intercalated with gadolinium atoms. dependences the resistance temperature point to a predominantly phonon scattering mechanism for charge carriers, while concentration are determined by increasing interstitial Gd x NbSe 2 (0≤ x≤0.33) studied in range 2-350 K fields up 70 kOe. Based results stu...

It was found that cesium carbonate has a unique catalytic ability on the reaction of carbonyl compounds with diphenyl diselenide to give the corresponding alpha-phenylseleno carbonyl compounds in moderate to good yields. Similarly, the alpha-phenylthiolation of carbonyl compounds with diphenyl disulfide was promoted by the cesium carbonate catalyst.

The title mol-ecule, C(16)H(18)Se(2), features a diselenide bridge between two 4-methyl-benzyl units, in which the central C-Se-Se-C torsion angle is 88.1 (3)°, while the two Se-Se-C-C fragments assume gauche conformations, with torsion angles of -51.8 (5) and 59.1 (4)°. The dihedral angle between the benzene rings is 78.9 (2)°.