prov:value
| - u is the ion valency ofeach of [L 1-R.sup.7 ] and [L.sup.2 ], indicating an integer of 1 to 7; v is an integer of 1 or more; and w=(v.times.u)/(e-f).Specific examples of the Lewis base represented by L.sup.1 include amines such as ammonia, methylamine, aniline, dimethylamine, diethylamine, N-methylaniline, diphenylamine, trimethylamine, triethylamine, tri-n-butylamine, N,N-dimethylaniline,methyldi
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