Coordination chemistry of tetra- and tridentate ferrocenyl polyphosphines: an unprecedented [1,1'-heteroannular and 2,3-homoannular]-phosphorus-bonding framework in a metallocene dinuclear coordination complex. - Thomas DA; Ivanov VV; Butler IR; Horton PN; Meunier P; Hierso JC (Inorganic chemistry, 2008)