Chemists look at reagents containing the less researched (compared to sulfur) chalcogen
elements selenium and tellurium.
Due to their 2D hexagonal arrangement, some TMDs such as Mo[S.sub.2] have a transition metal atom sandwiched between two chalcogen
atoms forming a S--Mo--S layer .
In comparison with halogen or chalcogen
, it is important to bear in mind the tiny ability of the carbon for donating electrons, even though the existence of [C.sup....]H was verified and valued by theoretical calculations and experimental analyses .
Ternary compounds of the form AB[X.sub.3], where A and B are metal atoms and X is a halogen or a chalcogen
, are exciting candidates as semiconductors for photovoltaics and other applications.
Manikanda, "Sizecontrolled synthesis of chalcogen
and chalcogenide nanoparticles using protic ionic liquids with imidazolium cation," Korean Journal of Chemical Engineering, vol.
Benchouck, "Optical properties of CuAl[X.sub.2] (X=Se, Te) thin films obtained by annealing of copper, aluminum and chalcogen
layers sequentially deposited," Thin Solid Films, vol.
TMDs are compounds composed of a transition metal such as molybdenum or tungsten and a chalcogen
(typically sulfur, selenium or tellurium, although oxygen is also a chalcogen
Interest in softer chalcogen
(S and Se) containing complexes is rapidly increasing because of their potential application in bioinorganic and coordination chemistry .
Jantan et al., "Bifunctional chalcogen
linkers for the stepwise generation of multimetallic assemblies and functionalized nanoparticles," Inorganic Chemistry, vol.
Vargas-Baca's own interest was with other heavy elements, specifically those in Group 16 of the periodic table known as the chalcogens
. His work revealed examples of cyclic molecules that formed automatically when single tellurium-oxygen chalcogen
bonds took the place of hydrogen bonds, a process unlike anything seen in halogen bonding.
For example, in the A-B intraverbal, the antecedent stimuli were, "Name the boron [-group] element" and the correct response was "indium"; in the B-C intraverbal, the antecedent stimuli were "Name the atomic number of the indium" and the correct response was "49." The other two A-B and B-C intraverbals were analogous, referred to the chalcogen
group, polonium, and the atomic number 84.