New Conformations and Binding Modes in Halogen-Bonded and Ionic Complexes of 2,3,5,6-Tetra(2‘-pyridyl)pyrazine

Autor:	Clifford W. Padgett, William T. Pennington, Rosa D. B. Walsh, Timothy W. Hanks, Gregory W. Drake
Rok vydání:	2004
Předmět:	biology Pyrazine Chemistry Stereochemistry Ionic bonding General Chemistry Condensed Matter Physics biology.organism_classification Bromide salt chemistry.chemical_compound Polyiodide Crystallography Polymorphism (materials science) Halogen Tetra General Materials Science Chloride salt
Zdroj:	Crystal Growth & Design. 5:745-753
ISSN:	1528-7505 1528-7483
DOI:	10.1021/cg049730z
Popis:	The enormous potential of 2,3,5,6-tetra(2‘-pyridyl)pyrazine (tppz) as a versatile multisite component for the design and construction of complex structures is demonstrated by the preparation of several new complexes that possess previously unobserved binding modes and conformations. tppz forms halogen-bonded complexes with diiodine and organoiodides and forms ionic compounds in which tppz is either di- or tetraprotonated. We have prepared two new halogen-bonded complexes of tppz with diiodine and with tetraiodoethylene (TIE). Both possess extended chain structures of alternating donors and acceptors, with the tppz donors in the diiodine complex linked by two neutral -I2·I2·I2- chains. Two new polyiodide complexes of tppz have also been prepared, one of which has di- and the other tetraprotonated cations. A bromide salt of the tetraprotonated tppz cation has also been prepared and found to be isomorphous with the known chloride salt. In the diiodine complex, tppz·6I2, the conformation of tppz is similar to...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3bb7a42d93f3d1a7c1d3e9d82933bcb7 https://doi.org/10.1021/cg049730z Zobrazit plný text záznamu