The potential of photochemistry for the synthesis of organometallic molecul
ar squares is illustrated by the preparation of the novel complexes [{(Co)(
4)Cr(4,4'-bipy)Re(CO)(3)Cl(4,3'-bipy)}(2)] and [ {(CO)(4)Mo(4,4'-bipy)Re(CO
)(3)Cl(4,4'-bipy)}(2)]. (C) 1999 Elsevier Science S.A. All rights reserved.