Assertion: pyridine | /r/CapableOf | derivative with 2‐thienyl groups
Facets:
value: in the 2,3‐positions
type: TEMPORAL
Source sentences:
text: Pyridine derivatives with 2‐thienyl groups in the 2,3‐positions (12 and 18 ) show higher Stokes shifts of about 105 nm, whereas the emission of the symmetrical tetrasubstituted pyridine 33 results in the strongest Stokes shift of 172 nm.