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Synthesis and some physical properties data for 1–4.
| Complex | Color | R | M.P. (°C) | Yield (%) | Calculated (Found; %) | |||
|---|---|---|---|---|---|---|---|---|
| C | H | N | Sn | |||||
| 1 | Pale yellow | Ph | 245–246 | 84 | 61.98 (62.10) | 4.81 (4.83) | 6.20 (6.29) | 17.74 (17.76) |
| 2 | Off-white | Bu | 225–226 | 81 | 55.25 (55.28) | 7.25 (7.29) | 6.89 (6.91) | 19.48 (19.51) |
| 3 | Off-white | Ph | 235–236 | 83 | 58.78 (58.60) | 4.85 (4.88) | 9.23 (9.24) | 13.01 (13.05) |
| 4 | Off-white | Me | 227–228 | 85 | 51.99 (52.02) | 5.13 (5.16) | 10.70 (10.71) | 15.11 (15.12) |
