The imino C=N double bond in the title compound, C(14)H(10)N(2)O, exists in an E conformation, with the phenyl ring being twisted by 80.7 (1)° in one independent mol-ecule and by 81.4 (1)° in the other with respect to the plane of the indoline fused-ring system. The two independent mol-ecules are linked by N-H⋯O hydrogen bonds, forming a zigzag chain running along the a axis.

The title mol-ecule, C(21)H(15)NO, has an indoline-2-one and two benzene substituent groups which are arranged in a propeller-like fashion around the central C atom. The dihedral angle between the two benzene rings is 73.32 (16)° and those between the benzene rings and the indoline-2-one group are 76.54 (14) and 67.69 (14)°. In the crystal, there is an inter-molecular N-H⋯O hydrogen-bonding int...

The title mol-ecule, C(8)H(7)N(3)O, is almost planar, with a maximum deviation of 0.0232 (2) Å from the least-squares plane. The Z conformation of the C=N double bond is stabilized by an intra-molecular N-H⋯O hydrogen bond. In the crystal, adjacent mol-ecules are linked by inter-molecular N-H⋯N and N-H⋯O hydrogen bonds, forming zigzag sheets parallel to the c axis; the sheets are further stabil...

In the title compound, C(17)H(15)NO, the dihedral angle between the phenyl rings is 80.1 (2)°. In the crystal, mol-ecules are linked by pairs of N-H⋯O hydrogen bonds, forming inversion dimers.

In the title compound, C(9)H(6)ClNO, the Cl atom deviates by 0.142 (1) Å from the quinoline ring mean plane (r.m.s. deviation = 0.013 Å). In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into [010] C(4) chains. Aromatic π-π stacking inter-actions [shortest centroid⋯centroid distance = 3.685 (3) Å] are also observed.

To this point, the class has dealt mainly with known, characterized gene sequences. We have learned several methods of comparing genes in hopes of quantifying divergence, highlighting similar gene segments which have been preserved among species, and finding optimal alignments of sequences such that we are better able to understand the ”evolution” of the sequence. We have used BLAST, hashing, p...