triphenylphosphine; cyclopentadienyl sodium; hydrochloric acid in tetrahydrofuran; water Mo-complex in THF treated with PPh3 and CpNa (molar ratio 1:2:5) at room temp. for 20 min, treated with excess of aq. HCl at room temp. for 5 min;

hydrogenchloride in water; acetone Mo compd. in acetone treated with aq. HCl for 30 min, under inert atm.; evapd. under reduced pressure;

hydrogenchloride in diethyl ether under N2: bubbling dry HCl through an ether soln. of complex at room temp.;;

CCl4 in ethylene glycol dimethyl ether; toluene under N2, suspn. of Mo complex in rigorously dried DME treated with 2-fold excess of NaBD4 at reflux, evapd., extd. with dry toluene, CCl4 added; crystals washed with dry toluene and with dry Et2O, dried in vac.;

in acetonitrile-D3 Irradiation (UV/VIS); (Ar); solvent = CD3CN or (CD3)2SO; wavelength >350 nm; 1 h; react. performed in the presence or absence of (NBu4)Cl; react. mechanism discussed;

in chloroform-d1 Irradiation (UV/VIS); (Ar); 1 h; wavelength >355, 430, and 530 nm; react. mechanism discussed;

THF in tetrahydrofuran; benzene under inert atm.; Mo-compd. dissolved in 1:1 mixt. of benzene and soln. of anhyd. FeCl3 in THF with stirring; pptn.; sepn. of (C5H5)2MoCl2 and FeCl2*1.5THF, soln. evapd. slowly, filtered, evapd., crystn. after 1 d, vac.-dried;

in chloroform-d1 Irradiation (UV/VIS); (Ar); 1.5 h; wavelength >530 nm: only formation of Cp2MoS2; wavelenth >350 nm: formation of both, Cp2MoS2 and Cp2MoCl2; react. mechanism discussed;

in not given N2-atmosphere;

in tetrahydrofuran byproducts: H2; addn. of FeCl3 soln. (2mmol) to soln. of (Cp)2MoH2 (1mmol), evolution of H2, pptn. of brown (Cp)2MoH2*FeCl2*THF; or addn. of FeCl3 soln. (4mmol) to soln. of (Cp)2MoH2 (1mmol), stirring, soln. brown, pptn. (reddish brown); sepd. by treatment with THF, heavier greenish violet fraction of (Cp)2MoCl2 and lighter white fraction of 2FeCl2*3C4H8O identified by elem. anal.;