Abstract: An oxo-nitrogenated iron complex having general formula (I) or (II) wherein: R1 and R2 identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R3, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X1 and X2, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR4 groups or —OR4 groups wherein R4 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.

Abstract: Process for the preparation of polyisoprene with a mainly alternating cis-1,4-alt-3,4 structure comprising polymerizing isoprene in the presence of a catalytic system comprising: (a) at least one pyridyl iron complex having general formula (I): wherein: R1 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R2 is selected from linear or branched C1-C10, preferably C1-C3, alkyl groups; X, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR3 groups or —OR3 groups wherein R3 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.

Abstract: Butadiene-isoprene diblock copolymer formed by a block of crystalline polybutadiene (hard block) and by a block of amorphous polyisoprene (soft block). Said butadiene-isoprene diblock copolymer can be advantageously used both in the footwear industry (for example, in the production of shoe soles), and in the production of tires for motor vehicles and/or trucks.

Abstract: Oxo-nitrogenated iron complex having general formula (I): in which: R1 and R2, identical or different, represent a hydrogen atom; or they are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R3 represents a hydrogen atom, or it is selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15 alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or they are selected from. linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR4 groups or —OR4 groups in which R4 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups; n is 2 or 3.

Abstract: Vanadium phosphinic complex having general formula (I) or (II): V(X)3[P(R1)n(R2)3-n]2??(I) V(X)3[(R3)2P(R4)P(R3)2]??(II) wherein: X represents an anion selected from halogens; or is selected from the following groups: thiocyanate, isocyanate, sulfate, acid sulfate, phosphate, acid phosphate, carboxylate, dicarboxylate; R1, identical or different among them, represent a hydrogen atom, or an allyl group (CH2?CH—CH2—); or are selected from alkyl groups C1-C20, linear or branched, optionally halogenated, optionally substituted cycloalkyl groups; n is an integer ranging from 0 to 3; R2, identical or different among them, are selected from optionally substituted aryl groups; R3, identical or different among them, represent a hydrogen atom, or an allyl group (CH2?CH—CH2—); or are selected from alkyl groups C1-C20, linear or branched, optionally halogenated, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R4 represents a group —NR5 wherein R5 represents a hydrogen atom, or is s

Abstract: Bis-imine titanium complex having general formula (I): wherein: R1 and R2, mutually identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated, C1-C20 alkyl groups, preferably C1-C15, optionally substituted cycloalkyl groups; R3 and R4, mutually identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated, C1-C20 alkyl groups, preferably C1-C15, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X1, X2, X3 and X4, mutually identical or different, represent a halogen atom such as chlorine, bromine, iodine; or are selected from linear or branched C1-C20 alkyl groups, preferably C1-C15, —OCOR5 groups or —OR5 groups wherein R5 is selected from linear or branched C1-C20 alkyl groups, preferably C1-C15; or represent an acetylacetonate group (acac); provided that when R1 and R2 represent a methyl group and X1, X2, X3 and X4 represent a chlorine atom, R3 and R4 are different from 2,

Abstract: Oxo-nitrogenated iron complex having general formula (I): in which: R1 and R2, identical or different, represent a hydrogen atom; or they are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R3 represents a hydrogen atom, or it is selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15 alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or they are selected from. linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR4 groups or —OR4 groups in which R4 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups; n is 2 or 3.

Abstract: An oxo-nitrogenated iron complex having general formula (I) or (II) wherein: R1 and R2 identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R3, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X1 and X2, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR4 groups or —OR4 groups wherein R4 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.

Abstract: Process for the preparation of syndiotactic 1,2-polybutadiene comprising polymerising 1,3-butadiene in the presence of a catalytic system comprising: —at least one pyridyl iron complex having the general formula (I), in which: —R1 represents a hydrogen atom; or a methyl group; —R2 represents a hydrogen atom; or is selected from linear or branched C1-C10 alkyl groups; —X, identical or different to one another, represent a halogen atom; or are selected from linear or branched, C1-C20 alkyl groups, —OCOR3 groups or —OR3 groups in which R3 is selected from linear or branched C1-C20 alkyl groups; —n is 2 or 3; —at least one aluminoxane having the general formula (II), (R4)2-AI-O-[-AI(R5)—O-]m-AI-(R6)2 (ll) in which R4, R5 and R6, identical or different to one another, represent a hydrogen atom, or a halogen atom; or are selected from linear or branched C1-C20 alkyl groups, cycloalkyi groups, aryl groups, said groups being optionally substituted with one or more silicon atoms or germanium; and m is an integer rangi

Abstract: Process for the preparation of polyisoprene with a mainly alternating cis-1,4-alt-3,4 structure comprising polymerizing isoprene in the presence of a catalytic system comprising: (a) at least one pyridyl iron complex having general formula (I): wherein: R1 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R2 is selected from linear or branched C1-C10, preferably C1-C3, alkyl groups; X, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR3 groups or —OR3 groups wherein R3 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.

Abstract: A process for preparing conjugated diene (co)polymers comprising polymerizing at least one conjugated diene in the presence of a catalytic system comprising: (a) at least one pyridyl iron (III) complex having general formula (I) or (II): wherein: —R1, R2, R3 and R4, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —R5 represents a hydrogen atom, or is selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR6 groups or —OR6 groups wherein R6 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.

Abstract: A bis-imine pyridine complex of lanthanides having general formula (I): Said bis-imine pyridine complex of lanthanides having general formula (I) can be advantageously used in a catalytic system for the (co)polymerization of conjugated dienes.

Abstract: Bis-imine titanium complex having general formula (I): wherein: R1 and R2, mutually identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated, C1-C20 alkyl groups, preferably C1-C15, optionally substituted cycloalkyl groups; R3 and R4, mutually identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated, C1-C20 alkyl groups, preferably C1-C15, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X1, X2, X3 and X4, mutually identical or different, represent a halogen atom such as chlorine, bromine, iodine; or are selected from linear or branched C1-C20 alkyl groups, preferably C1-C15, —OCOR5 groups or —OR5 groups wherein R5 is selected from linear or branched C1-C20 alkyl groups, preferably C1-C15; or represent an acetylacetonate group (acac); provided that when R1 and R2 represent a methyl group and X1, X2, X3 and X4 represent a chlorine atom, R3 and R4 are different from 2,

Abstract: Process for the preparation of 1,2 syndiotactic polybutadiene comprising polymerizing 1,3-butadiene in the presence of a catalytic system comprising: at least one cobalt complex with a phosphine ligand having general formula (I): wherein: R1, R2 and R3, mutually identical or different, are selected from branched C4-C20 alkyl groups, preferably C4-C15, C6-C30 cycloalkyl groups, preferably Ce-Cis, said cycloalkyl groups being substituted, C6-C30 aryl groups, preferably Ce-Cis, optionally substituted; provided that at least two of R1, R2 and R3 are selected from C6-C30 aryl groups, preferably Ce-Cis, optionally substituted; X1 and X2, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; at least one aluminoxane having general formula (II): (R4)2-AI-0-[-AI(R5)-0-]m-AI-(R6)2 (II) wherein R4, R5 and R6, mutually identical or different, represent a hydrogen atom, or a halogen atom such as, for example, chlorine, bromine, iodine, fluorine; or are selected from lin

Abstract: Disclosed are nitrogen titanium complexes having general formula (I) or (II). Catalytic systems that include the nitrogen titanium complexes and that can be used for the (co)polymerization of conjugated dienes are disclosed. Processes for (co)polymerization of conjugated dienes using the catalytic systems are also disclosed.

Abstract: Vanadium pyridine-imine complex having general formula (I), wherein: —R1, R2, R3, R4, R5 and R6, equal to or different from each other, represent a hydrogen atom; or are selected from linear or branched C1-C20 alkyl groups, preferably C1-C15, optionally halogenated cycloalkyl groups optionally substituted, aryl groups optionally substituted; —X1, X2 and X3, equal to or different from each other, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or are selected from linear or branched C1-C20 alkyl groups, preferably C1-C15, —OCOR7 groups or —OR7 groups wherein R7 is selected from linear or branched C1-C20 alkyl groups, preferably C1-C15; —Y is selected from ethers such as, for example, diethylether, tetrahydrofuran (THF), dimethoxyethane, preferably is tetrahydrofuran (THF); —n is 0 or 1. Said vanadium pyridine-imine complex having general formula (I) can be advantageously used in a catalytic system for the (co) polymerization of conjugated dienes.

Abstract: Butadiene-isoprene diblock copolymer formed by a block of crystalline polybutadiene (hard block) and by a block of amorphous polyisoprene (soft block). Said butadiene-isoprene diblock copolymer can be advantageously used both in the footwear industry (for example, in the production of shoe soles), and in the production of tires for motor vehicles and/or trucks.

Abstract: Process for the preparation of (co) polymers of conjugated dienes comprising polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one vanadium bis-imine complex having the general formula (I): wherein: m is 0 or 1; Z represents a —CR5R6 group wherein R5 and R6, equal to or different from each other, represent a hydrogen atom; or a C1-C20 alkyl group, preferably C1-C15, linear or branched; or a bivalent aromatic group optionally substituted; R1 and R2 equal to or different from each other, represent a hydrogen atom; or they are selected from C1-C20 alkyl groups, preferably C1-C15, linear or branched, optionally halogenated, cycloalkyl groups optionally substituted; or R1 and R2, may be optionally bound each other so as to form, together with the other atoms which they are bound to, a cycle containing from 4 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted by C1-C20 alkyl groups, preferably C1-C15, linear or branched, said cycle optio

Abstract: Process for the preparation of syndiotactic 1,2-polybutadiene comprising polymerising 1,3-butadiene in the presence of a catalytic system comprising: —at least one pyridyl iron complex having the general formula (I), in which: —R1 represents a hydrogen atom; or a methyl group; —R2 represents a hydrogen atom; or is selected from linear or branched C1-C10, preferably C1-C3, alkyl groups; —X, identical or different to one another, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched, C1-C20, preferably C1-C15, alkyl groups, —OCOR3 groups or —OR3 groups in which R3 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups; —n is 2 or 3; —at least one aluminoxane having the general formula (II), (R4)2-AI-O-[-AI(R5)—O-]m-AI-(R6)2 (ll) in which R4, R5 and R6, identical or different to one another, represent a hydrogen atom, or a halogen atom such as, for example, chlorine, bromine, iodine, fluorine; or are selected from linear or branched

Abstract: An oxo-nitrogenated iron complex having general formula (I) or (II) wherein: R1 and R2 identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R3, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, f optionally substituted aryl groups; X1 and X2, identical or different, represent a halogen atom such as, for example, chlorine, bromine, j iodine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR4 groups or —OR4 groups wherein R4 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.