From: Novel enaminone derived from thieno [2,3-b] thiene: Synthesis, x-ray crystal structure, HOMO, LUMO, NBO analyses and biological activity
D
H
A
D-H
H…A
D…A
D-H…A
C21
H21A
O1a
0.9300
2.5500
3.390 (3)
150.00
C22
H22A
0.9600
2.4000
3.299 (3)
155.00
C27
H27A
O2b
2.3900
3.232 (3)
146.00