N,N,N',N,-tetramethylethylenediamine; iodine in tetrahydrofuran Kinetics; to a soln. of nucleophile in THF was added soln. of complex in THF at -60°C; after 45 min at -60°C I2 in THF was added and soln. allowed to stir overnight while being warmed to room temp.;; soln. was filtered through Celite, evapd., extd. with ether, extract was washed with other solvents, then chromd. on silica column, eluent CHCl3-hexane;;

N,N,N',N,-tetramethylethylenediamine; iodine in tetrahydrofuran to a soln. of nucleophile in THF at -60°C soln. of complex was added, after 45 min at -60°C soln. of I2 in THF was added, and soln. was allowed to stir overnight while being warmed to room temp.;; soln. was filtered through Celite, evapd.; residue was extd. was ether and washed with other solvents; then chromd. on silica column, eluent CH2Cl2-hexane;;

lithium borohydride in THF-d8 (tetrahydrofuran-d8) byproducts: (THF-d8)nCr(CO)6-n, n=2,3; complex and LiBF4 were sealed in an NMR tube as a soln. in THF-d6 for 10 days;; detected by NMR-spectroscopy;;

N,N,N',N,-tetramethylethylenediamine; iodine; trifluoroacetic acid in tetrahydrofuran to a soln. of nucleophile in THF at -60°C soln. of complex was added, after 45 min at -60°C CF3COOH was added followed by I2, and soln. was allowed to stir overnight while being warmed to room temp.;; soln. was filtered through Celite, evapd.; residue was extd. was ether and washed with other solvents; then chromd. on silica column, eluent CH2Cl2-hexane;;

N,N,N',N,-tetramethylethylenediamine; iodine; trifluoroacetic acid in tetrahydrofuran to a soln. of nucleophile in THF at -60°C soln. of complex was added, after 45 min at -60°C CF3COOH was added followed by I2, and soln. was allowed to stir overnight while being warmed to room temp.;; soln. was filtered through Celite, evapd.; residue was extd. was ether and washed with other solvents; then chromd. on silica column, eluent CH2Cl2-hexane;;