Molecular iodine carries Lewis acid characteristics and as such catalyzes numerous transformations of organic compounds including those with oxygen functionality. The publication is a review, classification and evaluation of literature data dealing with this important role of iodine in organic chemistry and represents so far the most comprehensive proccedings of this important role of iodine in organic chemistry.
COBISS.SI-ID: 24407335
In an experimental study, significantly higher conductivity values than those of freshly prepared chemically analogous solutions were found in aged (~one year old) aqueous solutions, except for those stored frozen. The results surprisingly resemble a previously noticed phenomenon in liquid water, which develops when water is stored in closed vessels. The phenomenon was termed “autothixotropy of water” due to the weak gel-like behavior which develops spontaneously over time, in which ions seem to play an important role. Here, according to experimental results we propose that contact with hydrophilic surfaces also plays an important role. The role of the “autothixotropy of water” in proton transfer is also discussed.
COBISS.SI-ID: 35490309
Halogenation of 1-phenyl-3-(3,5-dimethoxyphenyl)-propane-1,3-dione with N–X reagents take place regioselectively at the α position (except for fluorination), while halogenation of its BF2 derivative take place regioselectively at position 2 in the activated phenyl ring. When the molar ratio of substrate to reagent is changed from 1:1.1 to 1:2.1 or 1:2.8, halogenation takes place at position 2 and 6 of the aromatic ring. Crystallization of a BF2 derivate from protic solvent led to hydrolysis of the BF2 group.
COBISS.SI-ID: 34845701