Page 1. Journal of Oganometallic Chemistry, 65 (1974) 169-179 0 Elsevier Sequoia SA, Lausanne - Printed in The Netherlands THE PREPARATION OF 7ZIYDROXYCOUMARIN SOME 4-ORGANOSILICON DERIVATIVES 169 OF C. EABORN, BN GHOSE and DRM WALTON School of Moleculur Sciences, University of Sussex, Brighton BNI 9QJ (Great Britain) (Received May 31st, 1973) ... 271. C12H1eBrSi calcd.: C, 53.1; H, 7.0; Br, 29.5%; mol. wt. ...