TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparations (Claimed): Metal based complex is prepared by reacting compound of formulae RuXY(CO)(PR3)n or RuXY(CO)(NHC)(PR3) with compound of formula (2) to yield compound of formulae (3) or (I).n=3 when R is optionally substituted 6-14C aryl preferably Ph or 2 when R is optionally substituted 1-14C alkyl preferably 1-6C alkyl or 3-8C cycloalkyl preferably cyclopentyl, cyclohexyl or cycloheptyl.Preferred Components: Compound (1) is chosen from RuHCl(CO)(PR3), RuH2(CO)(PR3), and RuCl2(CO)(PR3), preferably RuHCl(CO)(PCy3)2, RuHCl(CO)(PPh3)3, RuCl2(CO)(PCy3)2, RuCl2(CO)(PPh3)3, RuH2(CO)(PCy3)2, and RuH2(CO)(PPh3)3 and compound (2) is chosen from group of formulae (2a)-(2c). Resulting compound is chosen from compounds of formulae (3a)-PCy3, (3b)-PCy3, (3c)-PCy3, (3a)-PPh3, (3b)-PPh3 and (3c)-PPh3.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: Polymer contains repeating units based on conjugated diene monomer, nitrile rubber containing repeating units of conjugated diene, preferably 4-6C conjugated diene such as 1,3-butadiene, alpha , beta -unsaturated nitrile monomer, preferably 3-5 carbon containing alpha , beta -unsaturated nitrile, acrylonitrile, methacrylonitrile, ethacrylonitrile and their mixtures mono-unsaturated, monocarboxylic acids, esters and amides, alpha , beta -unsaturated, mono-unsaturated, dicarboxylic acids, monooder diesters, anhydrides and amides of alpha , beta -unsaturated dicarboxylic acids. Amount of complex to unsaturated substrates is 1-1000 ppm, preferably 5-250 ppm of noble metal based on unsaturated substrates in particular the nitrile rubber. Preferred Definitions:    M=Ru;    Y=H or Cl;    R1,R3,R4=H;    R2=NO2;    R5=H, optionally substituted 1-8C alkyl preferably Me, Et, n-Pr, i-Pr, n-Bu, i-Bu or tert.-Bu, optionally substituted 5-8C cycloalkyl preferably cyclopentyl, cyclohexyl or cycloheptyl, optionally substituted 6-10C aryl, preferably Ph which aryl is unsubstituted or contains 1, 2, 3, 4 or 5 identical or different substituents which are located in o- and/or p-positions and are chosen from 1-8C alkyl, particularly Me, Et, n-Pr, i-Pr, n-Bu, i-Bu and tert.-Bu, halo particularly Cl, Br, and I, OR7, OC(=O)R7, and CO(=O)R7;    R7=H, optionally substituted 1-14C alkyl, preferably 1-8C alkyl such as Me, Et, n-Pr, i-Pr, n-Bu, i-Bu or tert.-Bu;    R6=H, optionally substituted 1-14C alkyl, preferably 1-8C alkyl such as Me, Et, n-Pr, i-Pr, n-Bu, i-Bu, or tert.-Bu, optionally substituted 3-10C cycloalkyl, preferably 5-8C cycloalkyl such as cyclopentyl, cyclohexyl or cycloheptyl, optionally substituted 6-14C aryl, preferably 6-10C aryl, such as Ph which aryl is either unsubstituted or contains 1, 2, 3, 4 or 5 identical or different substituents;    NHC=N-heterocyclic carbene ligand of formulae (IIa)-(IIe) or (IIIa)-(IIIu);    R8-R11=H, 1-30C alkyl, 3-20C cycloalkyl, 2-20C alkenyl, 2-20C alkynyl, 6-24C aryl, 7-25C alkaryl, 2-20C heteroaryl, 2-20C heterocyclyl, 1-20C alkoxy, 2-20C alkenyloxy, 2-20C alkynyloxy, 6-20C aryloxy, 2-20C alkoxycarbonyl, 1-20C alkylthio, 6-20C arylthio, -Si(R)3, -O-Si(R)3, -O-C(=O)R, C(=O)R, -C(=O)N(R)2, -NR-C(=O)-N(R)2, -SO2N(R)2, halo, NO2 or CN; and    R=H, 1-30C alkyl, 3-20C cycloalkyl, 2-20C alkenyl, 2-20C alkynyl, 6-24C aryl or 2-20C heteroaryl.    SPECIFIC COMPOUNDS - 5 of 9 Compounds (I) are specifically claimed, e.g. group of formulae (Ia)-IMes, (Ia)-SIMes, (Ia)-IPr, (Ia)-IMes and (Ib)-SIMes.    EXAMPLE - Metal based complex was prepared by dissolving 200 mg tricyclohexyl phosphine ((3a)-PCy3) and 144 mg N,N'-bis(meistyl)imidazol-2-ylidene (IMes) in 15 ml anhydrous hexane, stirring at 50 degrees C for 17 hours, cooling the solution at room temperature, filtering and washing obtained precipitate three times with 3 ml anhydrous hexane, drying and obtaining 90 mg yellow solid.