Selected geometric parameters; bond lengths (Å) and torsion angles (°) of phenoxy pendant isatins 4 and 9 derived from the X-ray crystallographic study.

Compound	4	9
N(1)–C(12)	1.422(3)	1.415(4)
C(10)–C(11)	1.461(3)	1.453(5)
O(4)–C(10)/O(3)–C(10)	1.203(3)	1.207(4)
N(1)–C(9)	1.368(3)	1.359(4)
O(3)–C(9)/O(2)–C(9)	1.214(3)	1.212(4)
N(1)-C(8)-C(7)-O(2)/N(1)-C(1)-C(2)-O(1)	60.86	−62.68