Classify the following as electrophiles and nucleophiles:
(a) `CN^(-)` (b) `H_(2)O` (c) `Br^(+)` (d) `NO_(2)^(-)` (e) `overset(+)NO_(2)`
(f) `CH_(3)OH` (g) `H_(2)C=CH_(2)` (h) `RCOCl` (i) `H_(2)N-OH`
(j) `:(C Cl_(2)` (k) `H_(3)O^(+)` (l) `NH_(3)` (m) `BF_(3)` (n) `AlCl_(3)`
(o) `OH^(-)` (p) `R_(3)N`
