M-chlorobenzaldehyde P-chlorobenzaldehyde O-chlorobenzaldehyde 2.4-Dichlorobenzaldehyde 3.4-Dichlorobenzaldehyde 2.5-Dichlorobenzaldehyde O-chlorobenzoyl chloride P-chlorobenzoyl chloride O-chlorobenzyl chloride P-chlorobenzyl chloride O-chlorobenzonitrile P-chlorobenzonitrile O-fluorobenzonitrile P-fluorobenzonitrile M-chloropropiophenone