in hexane under Ar, Ti complex (0.706 mmol) dissolved in hexane (10 ml), N,N-bis(trimethylsilyl)sulfurdiimide added, mixt. stirred at 50°C for 5 d; amount of solvent reduced at 0°C, distilled at 70°C and 0.1 mbar to reveal 1,2,3,4-tetramethylfulvene, n-hexane, bis(trimethylsilyl)acetylene, and N,N'-bis(trimethylsilyl)sulfurdiimide, solid dissolved in n-hexane, stored at -78°C;

in hexane under Ar, Ti complex (0.706 mmol) dissolved in hexane (10 ml), N,N-bis(trimethylsilyl)sulfurdiimide added, mixt. stirred at 50°C for 5 d; amount of solvent reduced at 0°C, distilled at 70°C and 0.1 mbar to reveal 1,2,3,4-tetramethylfulvene, n-hexane, bis(trimethylsilyl)acetylene, and N,N'-bis(trimethylsilyl)sulfurdiimide, solid dissolved in n-hexane, stored at -78°C;