CuMnGeS and CuMnGeS: two polar thiogermanates exhibiting second harmonic generation in the infrared and structures derived from hexagonal diamond.

The new, quaternary diamond-like semiconductor (DLS) CuMnGeS was prepared at high-temperature from a stoichiometric reaction of the elements under vacuum. Single crystal X-ray diffraction data were used to solve and refine the structure in the polar space group CuMnGeS features [GeS] units and adopts the CuSiS structure type that can be considered a derivative of the hexagonal diamond structure. The DLS CuMnGeS with the wurtz-stannite structure was similarly prepared at a lower temperature.

Three 18-Electron Tantalum(I) Compounds, TaCl(CO)(2)(dppe)(2), [TaCl(CO)(2)(dppe)(2)](2x), and TaCl(CO)(4)(dppe) (dppe = 1,2-Bis(diphenylphosphino)ethane), Which Exhibit Low Levels of Paramagnetism.

Reductive carbonylation of TaCl(5) in the presence of 1,2-bis(diphenylphosphino)ethane (dppe) under the appropriate conditions results in the formation of TaCl(CO)(2)(dppe)(2) (1), as the major product, and the possibly cyclic oligomer [TaCl(CO)(2)(dppe)(2)](2)(x)() (2, 2x >/= 4) as a minor product. Carbonylation of 1 (1 atm) results in the rapid but reversible formation of TaCl(CO)(4)(dppe) (3). Solutions of all three compounds exhibit low levels of paramagnetism, possibly attributable to thermal population of low-lying triplet excited states.

Antioxidant Activity of Onion and Garlic Juices in Stored Cooked Ground Lamb .

The effects of onion juice on several characteristics of cooked ground lamb were investigated. Onion juice was a more effective antioxidant than garlic juice in reducing development of rancidity in meat. TBA values for onion-treated samples were lower (P<0.