Lithiation of the bis(pyrazolyl)methanes H2C(PzAd,Me)2 (1 a) and H2C(PzPh,Ph)2 b) subsequent addition N,N’-diisopropylcarbodiimide in THF yields [(thf)Li{(PzAd,Me)2HC−C(=NiPr)(NiPr)}] (2 [(thf)Li{(PzPh,Ph)2HC−C(=NiPr)(NiPr)}] b). For comparison reasons, structure [(thf)Li{(PztBu,tBu)2HC−C(=NCy)(NCy)}] (I) has been determined as well. Protolysis with aqueous ammonium chloride solution gives (PzA...

The use of organic solvents in developing countries has been wide spread in the last century [1]. Organic solvents are used in different industrial processes and are sometimes considering important supplies in order to obtain more benefit in any type of manufacturer business, due to they can be reused [2]. Organic solvents are commonly used in the dry cleaning industry, because relatively stabl...

Macrocystis pyrifera (Giant Kelp), a dominant macroalgal species in southern California, produced I71 ng per g fresh wt (gfwt) per day of CHBr, and 48 ng gfwt-’ d-’ of CH,Br, during laboratory incubations of whole blades. Comparable rates were measured during in situ incubations 01 intact fronds. Release of CHBr, and CH,Br, by M. pyr$eru was affected by light and algal photosynthetic activity, ...