Other chemicals acquired from Acros-Organics include: 1-bromo ethyl benzene (97%), triethylamine (99%), 4-dimethylamino pyridine (99%), 2-chloropropionyl chloride (95%), 2, 2'-dipyridyl Bipy
(extra pure, 99%), calcium hydride Ca[H.
Bipy Prabhakar, 36, complained of severe chest pain at around 2am in his accommodation in Tubli, his friend Premchand Madhubhavan told the GDN.
His roommate called an ambulance but by the time it arrived Bipy was dead.
BiPy obtained from Fluka (purity >99%, mp = 109-112[degrees]C) was used as received.
BiPy and MCI, in stoichiometric amounts relative to the functional ([greater than or equal to]N and - [CH.
The chloromethyl side-functionalized polysiloxanes (CMCI1-CMC13), and BiPy, in stoichiometric ratio related to the functional groups, were dissolved together in a [CHCl.
Side chloromethyl-functionalized polysiloxanes were reacted with BiPy (Menshutkin reaction) to obtain networks consisting of siloxane hydrophobic backbones interconnected between them through hydrophilic bridges with oppositely charged ion pairs (11), (12).
BiPy acts as a nucleophile agent forming bipyridinium salt with chloromethyl groups side attached to polysiloxane chains.
In fact, in the final network, the crosslinks by bipyridinium bridges can coexist with dangling BiPy units bound at one of the nitrogens only, and unreacted chloromethyl groups.