TABLE 3.

Typical IR data (in cm⁻¹) for compounds 11–13, 11B–13B.

Bond	10	10B	11	11B	12	12B	13	13B
νC=N	1,499.38	1,504.1	1,493.6	1,522.2	1,504.2	1,520.6	1,509.9	1,519.1
ν(ph)C-N	1,441.5	1,466.5	1,426.1	1,478.1	1,431.9	1,483.9	1,436.7	1,452.1