Table 4: 13C-NMR chemical shifts for C (7) (iminoyl carbon-13C=N), and coupling constants 1J (103Rh-31P) Hz and 2J (103Rh-31P) Hz.

Complex No. X C(7) (ppm) 1J (103Rh-31P) (Hz) 2J (103Rh-31P)(Hz)
21. H 220.1 33 8
22. 2-OH 222.8 32 8
23. 4-NO2 224.1 33 8
24. 4-Br 222.0 32 9