Our site uses cookies to improve your experience. You can find out more about our use of cookies in About Cookies, including instructions on how to turn off cookies if you wish to do so. By continuing to browse this site you agree to us using cookies as described in About Cookies. ... Novel,C 2 -symmetric 1,2-bis(phosphetano)benzene ligands (see figure) are readily synthesized from the corresponding diol cyclic sulfates. When complexed to ruthenium, they form powerful ...