On the synthesis and 31P NMR spectrum of (CO)5W(μ-PPh2CH2PPh2)W(CO)5

Article abstract of DOI:10.1016/0022-328X(94)05384-N

The dimetallic complex, (CO)5W(μ-PPh2CH2PPh2)W(CO)5, is synthesized from either a 2:1 mixture of (CO)5W(NCMe) and (CO)5W(η¹-PPh2CH2PPh2) or a 3:1 mixture of (CO)5W(NCMe) and PPh2CH2PPh2 in toluene at 60 deg C.The coupling constants, ²J_PP' = 22.9 Hz, ¹J_WP = 246.9 Hz and ³J_WP' = 4.5 Hz are consistent with those reported in the literature for similar complexes.The complex (CO)5W(η¹-PPh2CH2PPh2) is stable with respect to chelation at room temperature. Keywords: Tungsten; Bis(diphneylphosphino)methane; P-31 NMR; Ditertiary phosphines; Coupling constants; Carbonyl