[C:1]([B-:3]([C:8]#[N:9])([C:6]#[N:7])[C:4]#[N:5])#[N:2].[K+].[Br-].[CH3:12][N+:13]1([CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH3:25])[CH2:17][CH2:16][CH2:15][CH2:14]1>>[C:1]([B-:3]([C:8]#[N:9])([C:6]#[N:7])[C:4]#[N:5])#[N:2].[CH3:12][N+:13]1([CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH3:25])[CH2:14][CH2:15][CH2:16][CH2:17]1Analogously to Example A, 61 g of potassium tetracyanoborate are added to 100 g of 1-methyl-1-octylpyrrolidinium bromide, and the mixture is subjected to corresponding work-up, giving a clear, yellowish, viscous liquid.
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