NOVELTY - Leaving substituent-containing benzene compounds (I) are new, where (I) can be converted to substituted benzene (II) and substituted hydrocarbyl compound (III).    USE - (I) are useful: in an ink and an organic film; for forming (II) which is useful in an organic semiconductor material that is useful in an organic electronic device; and for producing a film-like product containing a pi -electron conjugated compound (all claimed), where organic electronic devices are organic electroluminescence elements, organic semiconductors and organic solar cells, and optical electronic devices e.g. electroluminescent light-emitting elements, electronic paper, various sensors and radio frequency identification.    ADVANTAGE - (I): are synthesized in a simple manner and has high solubility to an organic solvent; provide an organic semiconductor material containing an organic semiconductor compound produced with high yield without unstable end substituents with excellent processability; perform elimination reaction using lower energy (at lower temperatures) than conventional compounds; can efficiently produce a sparingly-soluble continuous thin film of the pi -electron conjugated compound at high yield in a simple manner; provide transistor with excellent p-type transistor characteristics and with good field-effect transistor characteristics; provide organic thin-film transistor with excellent hole mobility and current on/off ratio; and provide display device having a large area can be produced at low energy and cost, in a simple process.    DETAILED DESCRIPTION - Leaving substituent-containing benzene compounds of formula (I) are new, where (I) can be converted to substituted benzene of formula (II) and substituted hydrocarbyl compound of formula (X-Y1) (III).    X, Y1 = H or leaving substituent (where one of X and Y1 is the leaving substituent and the other is H);    Q2-Q5 = H, halo or monovalent organic group; and    Q1, Q6 = H, halo or monovalent organic group other than the leaving substituent, where among Q1-Q6, adjacent monovalent organic groups are linked together to form a ring.    INDEPENDENT CLAIMS are also included for:    (1) an ink comprising (I) and a solvent;    (2) an organic thin-film transistor which is an organic electronic device comprising an organic semiconductor material that comprises (II);    (3) a display device comprising the organic thin-film transistor and a display pixel that is driven by the organic thin-film transistor;    (4) producing a film-like product comprising forming a coating film on a substrate by coating the substrate with a coating liquid containing in a solvent a pi -electron conjugated substituted hydrocarbyl compound precursor of formula (A-(B1)m) (IV), and eliminating an eliminated component of (III) to form a pi -electron conjugated substituted hydrocarbyl compound of formula (A-(C1)m) (V) in the coating film;    (5) producing a pi -electron conjugated compound comprising: eliminating (III) from (IV) so as to form (V); and    (6) a pi -electron conjugated compound obtained by the above method.    A = pi -electron conjugated substituent;    B1 = solvent-soluble substituent containing (I) as at least a partial structure;    m = natural number, where (B1) is linked via a covalent bond with (A), and the covalent bond is formed between an atom present on Q1-Q6 and an atom present on (A) or (B1) is ring-fused with (A) via atoms present on (A); and    C1 = (II) as at least a partial structure.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the organic thin-film transistor.    Organic semiconductor layer (1)    Source electrode (2)    Drain electrode (3)    Gate electrode (4)    Insulating film (5)