Benzo(c)thiophene explained

Benzo[''c'']thiophene is an organic compound with the chemical formula C₈H₆S.^[1]

The similarly named Benzo[b]thiophene is an isomer with the sulfur in the position adjacent to the benzene ring. Benzo[b]thiophene is more stable and far more commonly encountered.

Notes and References

1. Nonclassical Condensed Thiophenes. Cava, Michael P. . Lakshmikantham, M. V. . 10.1021/ar50088a005. Accounts of Chemical Research. 1975. 8. 4 . 139–44.