Zg. Fang et al., MOLECULAR-STRUCTURES OF 1,1'BIS-(DIPHENYLPHOSPHINO)FERROCENE OXIDE AND SULFIDE AND THEIR THERMAL-PROPERTIES, Polyhedron, 14(17-18), 1995, pp. 2403-2409
The crystal and molecular structure of anhydrous 1,1'-bis(di-phenylpho
sphino)ferrocene sulphide, Fe[C5H4P(S)Ph(2)](2) (dppfS(2)), is reporte
d and compared with the hydrated oxide analogue, Fe[C5H4P(O)Ph(2)](2)
. 2H(2)O (dppfO(2) . 2H(2)O). It consists of two phosphoryl cyclopenta
dienyl rings [P-S = 1.938(2) Angstrom] sandwiching all Fe-II centre. W
ith four molecules per cell, the molecule is crystallographically requ
ired to sit on an inversion centre and hence the two rings are stagger
ed. The thermal properties of [Fe(C(5)H(4)PPh(2))(2)] (dppf), dppfO(2)
. 2H(2)O and dppfS(2) were studied together with Fe(Cp)(2) and Ph(3)P
O . H2O by TGA and DSC. The thermal stability decreases in the order d
ppfO(2) > dppf > dppfS(2). The hydrogen-bonded hydrate in dppfO(2) . 2
H(2)O is removed upon heating to 110-160 degrees C.