6533b857fe1ef96bd12b4466

RESEARCH PRODUCT

Packing incentives and a reliable N–H⋯N–pyridine synthon in co-crystallization of bipyridines with two agrochemical actives

Erkki KolehmainenElisa NauhaMaija Nissinen

subject

röntgen diffraktioyhteiskideChemistryHydrogen bondSynthonClose-packing of equal spheressupramolecular synthonGeneral ChemistryCondensed Matter Physicsco-crystalsupramolekyyliX-ray diffractionlaw.inventionGrindingchemistry.chemical_compoundlawPyridineSlurryOrganic chemistryGeneral Materials ScienceCrystallizationcocrystalta116Single crystal

description

The co-crystallization of agrochemical actives thiophanate-methyl and thiophanate-ethyl with 2,2′-bipyridine, 4,4′-bipyridine and 1,2-bis(4-pyridyl)ethane was investigated with conventional crystallization, the slurry method and liquid-assisted grinding. Co-crystals of both thiophanates with all bipyridines were found and the structures solved with single crystal X-ray diffraction. Whereas the 2,2′-bipyridine co-crystals seem to form because of a combination of weak interactions, and in the case of the thiophanate-methyl, partly because of close packing incentives, the 4,4′-bipyridine and 1,2-bis(4-pyridyl)ethane co-crystals form mainly because of a favourable N–H···N–pyridine hydrogen bonding synthon. peerReviewed

https://doi.org/10.1039/c1ce05730h