in n-heptane; diethylene glycol mixture in diglyme/heptane refluxed for 6 h, cooled; solvent evapd. under reduced pressure, residue chromd. (Al2O3, benzene/petroleum ether (1:1)), collected;

in hexane Irradiation (UV/VIS); a soln. of complex in n-hexane was satd. with propyne for 5 min then irradiated at 270 K for 0.5-4.5 h (N2); further products; detected by NMR spectra;