TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The hydrogen source is selected from hydrogen gas; phosphites selected from sodium hypophosphate (NaH2PO2), sodium phophite (NaH2PO3), sodium phosphate (NaH2PO4) or sodium perphosphate (NaHPO5); metal hydrides selected from lithium borohydride (LiBH4), lithium aluminum hydride (LiAlH4) , sodium borohydride (NaBH4), sodium aluminum hydride (NaAlH4), magnesium borohydride (Mg(BH4)2), magnesium aluminum hydride (Mg(AlH4)2), calcium borohydride (Ca(BH4)2), calcium aluminum hydride (Ca(AlH4)2), lithium hydride (LiH), sodium hydride (NaH), potassium hydride (KH), magnesium hydride (MgH2) or calcium hydrjde (CaH2); formic acid, hydrazine hydrochloride or 3-10C 2-hydroxyalkane. The radical reductant and a radical initiator is employed as the hydrogen source. The noble metal catalyst contains at least one metal selected from platinum (Pt), palladium (Pd), ruthenium (Ru) or rhodium (Rh). The noble metal catalyst is supported on at least one carrier selected from carbon substances, silica, alumina or titania.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The radical reductant is selected from tris(trimethylsilyl)methane (TMS3CH), tributyl tin hydride (Bu3SnH), triphenyl tin hydride (Ph3SnH) or trimethyl tin hydride (Me3SnH). The radical initiator is selected from azobisisobutyronitrile (AIBN) or 1,1-azobis(cyclohexane carbonitrile) (VAZO).    TECHNOLOGY FOCUS - POLYMERS - Preferred Compound: The polymer-transition metal hydride complex is of formula -(Ar1((Y1)p)((MHi)r)-J1)m-(Ar2((Y2)q)-J2)n- (II). Preparation (claimed): Preparation (P1) of polymer-transition metal halide complex (IV) involves reacting polymer compound comprising an aromatic ring of formula -((Ar((Y')a)-J)m+n)- (V) with alkali metal to activate the aromatic ring, followed by reacting metal halide of formula MXi+1 (VI) with the activated aromatic ring. Preparation (P2) of polymer-transition metal hydride complex (II) involves reacting polymer-transition metal complex of formula -(Ar1((Y1)p)((MLb)r)-J1)m-(Ar2((Y2)q)-J2)n- (VII) in the presence of hydrogen source. Polymer-transition metal complex (VII) is preferably polymer-transition metal halide complex (IV). Preparation (P3) of polymer-transition meta hydride complex involves i) reacting polymer of formula (V) with an alkali metal to activate the aromatic ring, and reacting it with a metal halide of formula (VI) to obtain a polymer-transition metal halide complex (IV); and ii) preparing a polymer-transition metal hydride complex (II) from the polymer-transition metal halide complex (IV) in the presence of hydrogen source. The process (P2) involves iii) mixing polymer-transition metal halide complex, at least one metal hydride selected from lithium borohydride (LiBH4), sodium borohydride (NaBH4) or magnesium borohydride (Mg(BH4)2), and 2-propanol/2-butanol as 2-alkanol under nitrogen atmosphere to obtain a reaction mixture; iv) incorporating a noble metal catalyst (0.01-50 mol.%, 1-20 wt.%) to the reaction mixture; and v) heating the resultant mixture under reflux with hydrogen gas supply. The process further involves adding at least one hydroxide compound selected from sodium hydroxide (NaOH) or potassium hydroxide (KOH) to the reaction mixture in step (b2). The pressure of the hydrogen gas supply in step (iv) is 1-30 bar.L=halogen, -OR4, -NHR5, -SO4 or -NO3;R4 and R5=1-10C alkyl;andb=(valence of M)/(valence of L). Preferred Definitions:    Ar1 and AR2=phenylene, naphthylene or anthrylene;    M=Ti, V or Sc;and    i=3.    M is bonded on the plane of aromatic ring Ar1.    EXAMPLE - A flask was charged with titanium (IV) chloride (2.9 ml, 0.026 mol) and chloroform (40 ml) under nitrogen atmosphere. Poly(2,6-dimethyl-1,4-phenylene oxide) (6.24 g, 0.052 mol, based on the monomer) thoroughly dissolved in chloroform (30 ml) was reacted with sodium at -50 degrees C to be activated, and the mixture was slowly added to the flask. After heating the resultant mixture was refluxed at 90 degrees C for 24 hours to give poly (2,6-dimethyl-1,4-phenylene oxide) titanium chloride (65% yield).