Research Article
BF3·Et2O Catalysed 4-Aryl-3-phenyl-benzopyrones, Pro-SERMs, and Their Characterization
Table 1
Bond lengths and bond angles of (vi-e) have been demonstrated.
| S. number | Atoms | Bond lengths | Atoms | Bond angles |
| 1 | O3-C20 | 1.3772() | C20-O3-C23 | 117.76 | 2 | O3-C23 | 1.3963() | C8-O1-C7 | 121.71 | 3 | O1-C8 | 1.3848() | O3-C20-C21 | 115.93 | 4 | O1-C7 | 1.3722() | O1-C8-C1 | 115.40 | 5 | C5-C6 | 1.3610() | O3-C20-C19 | 124.73 | 6 | C6-C7 | 1.4647() | O1-C7-C6 | 117.78 | 7 | O2-C7 | 1.2114() | C6-C7-O2 | 125.71 |
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