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2-Aminopyridiniomethylphosphonite: A hydrogen-bonded polymer from the hydrolysis of 1,3,4-diazaphospholo[1,2-a]pyridine

✍ Scribed by Igor A. Litvinov; Konstantin Karaghiosoff; Alfred Schmidpeter; Elena Y. Zabotina; Evelina N. Dianova

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 602 KB
Volume: 2
Category: Article
ISSN: 1042-7163
DOI: 10.1002/hc.520020304

No coin nor oath required. For personal study only.

✦ Synopsis

Condensation of 2-aminopyridine and chloromethyldichlorophosphane yields I ,3,4-diazaphospholo[l,2-a]pyridine 2. Methanol adds to 2 while diethylamine does not; with additional elemental sulfur, in both cases the sulfides 4,6 of the respective adducts are formed. Hydrolysis of 2 specifically opens the PNbond and gives the zwitterionic 2-arninopyridiniomethylphosphonite 7 . The compound crystallizes with one molecule water in the mopoclinic space grou P2,k with ,a = 25.490(7)A, b = 7.365( 4)[ c = 9.088(3)A, p = 100.06(3)", and Z = 8 with two independent molecules of 7 and of water. In the crystal hydrogen bonds connect the molecules of 7 to form double-chain structured polymers. The individual double-chains are linked to each other by hydrogenbonded water molecules.

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