NOVELTY - A complex compound having pyridyl ring-containing compound (II or II') coordinated with metal atom, is new.    USE - Complex compound used as photosensitization pigment in photoelectric transducer used in electrochemical cell (all claimed), solar cell, photosensor and artificial light.    ADVANTAGE - The complex compound has excellent photoelectric transfer characteristic and provides photoelectric transducer having excellent photoelectric conversion efficiency.    DETAILED DESCRIPTION - A complex compound having pyridyl ring-containing compound of formula (II or II') coordinated with metal atom, is new.    R1-R3=group of formula: -L-Ar-A (III), -L-Ar-Y' (IV), -A (V) or -Y' (VI);    a-c=0 or 1-2;    a+b+c=1 or more;    L=coupling group of formula (VII) or -(CC)q- (VIII);    Ar=optionally substituted aryl;    A=acidic group or its salt;    Q1,Q2=H, 1-20C alkyl, 1-20C alkoxy, 6-20C aryl or cyano;    p,q=1-3;    Y'=H, 1-20C alkyl, 1-20C alkoxy, 6-20C alkoxyalkyl, 6-20C aryloxy, 7-20C arylalkyloxy, 7-20C aryloxy alkyl, 1-20C alkylthio, 2-20C alkylthio alkyl, 6-20C arylthio, 7-20C arylalkylthio, 7-20C arylthio alkyl, 1-20C alkylsulfonyl, 6-20C arylsulfonyl, 1-20C cyano alkyl, amino having 6-20C aryl;    R1'-R4'=acidic group or its salt of formula: -(L')a'-(Ar)b'-R5', H, 1-20C alkyl, 1-20C alkoxy, 2-20C alkoxy alkyl, 6-20C aryloxy, 7-20C arylalkyloxy, 2-20C ester, 7-20C aryloxyalkyl, 1-20C alkylthio, 2-20C alkylthio alkyl, 6-20C arylthio, 7-20C arylalkylthio, 7-20C arylthio alkyl, 1-20C alkylsulfonyl, 6-20C arylsulfonyl, 1-20C cyano alkyl or amino having 6-20C aryl group;    R5'=R1' excluding acidic group;    L'=L;and    a',b'=0 or 1.    INDEPENDENT CLAIMS are included for the following:    (1) manufacture of tin compound of formula (A or B), which involves reacting halogen compound of formula (IX or X) with tin reagent of formula: R8-Sn(R7)(R9)-Sn(R12)(R10)-R11 in the presence of metal catalyst;    (2) manufacture of the compound of formula (II), which involves coupling the tin compound of formula (A or B) with halogen compound in the presence of metal catalyst to obtain pyridyl ring-containing compound of formula (XVI), and hydrolyzing the obtained compound; and    (3) manufacture of the compound of formula (II'), which involves reacting dipyridyl compound of formula (1') with compound of formula: (R6')3-Sn-Sn-(R6')3 to obtain tin substituted compound of formula (3'), reacting the obtained compound with dipyridyl compound of formula (4') in presence of metal catalyst to obtain tetrapyridyl compound of formula (5'), and removing protecting group of compound (5').    X=halogen;    R4-R6=-L-Ar-B' (XII), -L-Ar-Y' (IV), -B' (XIII) or -Y' (VI);    B'=acidic group which introduces protecting group;    R7-R12=1-6C alkyl;    R6'=1-4C alkyl;    R1"-R4"=acidic group which introduces protecting group;and    R7'=acidic group, H or substituent containing protecting group.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional of view of photoelectric chemical cell.    Substrate (1)    Conductive layer (2)    Semiconductor particle layer (3)    Photosensitization pigment (4)    Electrolyte solution (5)