Synthesis and Characterization of 3-(1-((3,4-Dihydroxyphenethyl)amino)ethylidene)-chroman-2,4-dione as a Potential Antitumor Agent

Table 2

Hydrogen bonds for 3·MeOH [Å and °].

D−H···A	d(D−H)	d(H···A)	d(D···A)	<(DHA)
N1−H1N1···O3	0.91 (2)	1.76 (2)	2.550 (1)	143.7 (16)
O5−H1O5···O6	0.87 (2)	1.80 (2)	2.661 (1)	169.2 (18)
O4−H1O4···O2^i	0.84 (2)	1.88 (2)	2.700 (1)	167.5 (18)
O6−H1O6···O4^ii	0.88 (2)	1.92 (2)	2.786 (1)	167.0 (19)
C4−H4···O1^i	0.95	2.57	3.417 (2)	148.6

Symmetry transformations used to generate equivalent atoms: −x + 2, −y + 1, −z + 1; (ii): −x + 2, −y + 2, −z + 2.