TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): An ( pi ) conjugated organic boron compound of formula (III) and organometallic compound are subjected to coupling-reaction to obtain ( pi )-conjugated organic boron component compound of formula (IV). A boron organic compound of formula (V) treated in presence of Lewis' acid catalyst to obtain ( pi )-conjugated organic boron compound having borinine unit (A). A boron organic compound of formula (VI) treated in presence of Lewis' acid catalyst to obtain ( pi )-conjugated organic boron compound having diborinine unit (B).R15-R26=H or 1-20C alkyl;R27-R30=H, halo, boronic acid or its ester, silyl or stannyl;Y'=group having ( pi )-bond;R31-R36=R15;R37=halo, boronic acid or its ester, silyl or stannyl;Ra1,Ra2=R15;Ra3-Ra5=H, halo, boronic acid or its ester, silyl or stannyl;Ra7,Ra8=1-20C alkyl;Rb1,Rb2= Ra3;andRb3-Rb6=Ra7.Preferred Composition: The ( pi )-conjugated organic boron compound has thiophene structure, fluorene structure, thiazole skeleton, pyridine skeleton, oxadiazole skeleton, thiadiazole skeleton and/or benzothiadiazole skeleton in arylene group, group having pi-bond and group containing triarylamine. The Lewis' acid catalyst is scandium (III) trifluoromethane sulfonate. SPECIFIC COMPOUNDS - ( pi )-Conjugated organic boron compound is disclosed as 8,8,14,14-tetramethyl-11-(5-(8,8,22,22-tetramethyl-1-borahexacyclo(11.7.1.13,19.02,7.09,21.015,20)docosa-2,4,6,9,11,13(21),15(20),16,18-nonaen-5-yl)thiophen-2-yl)-1-borahexacyclo(11.7.1.13,19.02,7.09,21.015,20)docosa-2,4,6,9,11,13(21),15,17,19-nonaene methane of formula (VII).    EXAMPLE - Suzuki-Miyaura cross-coupling of monobromo plane fixed borane and 2,5-thiophene diboronic acid was carried out to obtain 8,8,14,14-tetramethyl-11-(5-(8,8,22,22-tetramethyl-1-borahexacyclo(11.7.1.13,19.02,7.09,21.015,20)docosa-2,4,6,9,11,13(21),15(20),16,18-nonaen-5-yl)thiophen-2-yl)-1-borahexacyclo(11.7.1.13,19.02,7.09,21.015,20)docosa-2,4,6,9,11,13(21),15,17,19-nonaene methane.