Enichem S.p.a

Montedison S.p.a.

Sigea S.r.l.

Siega S.r.l.

Giovanni Mestroni

Anna Sommazzi

Barbara Milani

Enzo Alessio

Fabio Garbassi

Gianni Sava

Alberta Bergamo

Grazia Zassinovich

Annamaria Camus

Francesco Masi

Antonio Alfonso Proto

Sonia Zorzet

Gianni Corso

Lidia Vicentini

Elisabetta Iengo

A class of anionic and neutral complexes of ruthenium (II) containing nitrogen oxide (NO) and optionally a nitrogen ligand is described; a process for their preparation is also described. The preparation process includes the use of starting complexes of ruthenium (III) which are reacted with suitable reagents so as to obtain complexes containing NNO coordinated to ruthenium (II). Additional substitution reactions allow the introduction of new groups that coordinate to the ruthenium atom, among which some nitrogen ligands.

Anionic and neutral complexes of ruthenium (II) with nitrogen oxide

A class of anionic and neutral complexes of ruthenium (II) containing nitrogen oxide (NO) and optionally a nitrogen ligand is described; a process for their preparation is also described. The preparation process includes the use of starting complexes of ruthenium (III) which are reacted with suitable reagents so as to obtain complexes containing NO coordinated to ruthenium (II). Additional substitution reactions allow the introduction of new groups that coordinate to the ruthenium atom, among which some nitrogen ligands.

New ruthenium dimeric complexes with high antimetastatic and antitumour activity and remarkable chemical stability are described.

Ruthenium dimeric complexes suitable as antimetastatic and antineoplastic agents

Organometallic complex having the formula (IAP)M(X) which can be used for die formation of catalytic systems wherein: M is a metal selected from transition metals and lanthanides, in oxidation state &ldquo;s&rdquo; positive and different from zero; each X is independently a group of an anionic nature bound to the metal as an anion in an ionic couple or with a convalent bond of the &ldquo;&sgr;&rdquo; type; &ldquo;n&rdquo; expresses the number of X groups sufficient for neutralizing the formal &ldquo;&plus;s&rdquo; charge of the metal M, and (IAP) represents a neutral bond consisting of a mono-imine of 2,6-diacylpyridine. Said complex is prepared with relatively simple methods and can be used, combined with a suitable co-catalyst, such as for example, an aluminoxane, as a catalyst in normal (co)polymerization processes of &agr;-olefins, and especially ethylene.

Metal complexes comprising a 2,6-diacylpyridine-ligand and their use in the polymerization of ethylene

A salt of an anionic complex of Ru(III) with an ammonium cation fof formula (I),

Salts of anionic complexes of RU(III), as antimetastatic and antineoplastic agents

A process for the preparation of alternated linear copolymers based on carbon monoxide and one or more compounds having an unsaturation of the alkenylic type comprises, reacting in a halogenated aromatic or aliphatic solvent the carbon monoxide and one or more compounds having an alkenylic unsaturation in the presence of a catalyst having general formula (I)

Process for the preparation of copolymers based on carbon monoxide and

Linear alternating copolymers of carbon monoxide and at least one compound containing an alkenyl unsaturation are obtained by reaction between carbon monoxide and at least one compound containing an alkenyl unsaturation, in a solvent which is liquid under the operating conditions, in the presence of a preformed bischelated catalyst having general formula (I) active without cocatalysts:

Process for the preparation of copolymers of carbon monoxide and at

An improved process is described for the preparation of alternating linear copolymers based on carbon monoxide and at least one compound containing an alkenyl unsaturation which comprises reacting in a liquid solvent under the operating conditions, a mixture of carbon monoxide and one or more compounds containing an alkenyl unsaturation in the presence of: (i) a catalyst having general formula (I)

Process for preparing straight, alternate polymers based on carbon monoxide and at least one olefin, which comprises causing carbon monoxide and the olefin to react in the presence of:

Process for preparing polymers based on carbon monoxide and olefins

A process is herein described for catalytically reducing nitroaromatic compounds by displacement of hydrogen from carbon monoxide and water or from synthesis gas to nitroaromatic compounds, the catalytic reduction being catalyzed by complexes of rhodium, iridium, ruthenium and osmium; said process is characterized in that the CO+H.sub.2 O system or the (CO+H.sub.2)+H.sub.2 O system is caused to react with a nitroaromatic compound of formula:

Process for catalytically reducing nitroaromatic compounds

This invention relates to a process for the reduction of .alpha.-,.beta.-unsaturated linear homo- and heterocyclic ketones by a transfer of hydrogen from an alcohol donor to said unsaturated ketone. The alcohol donor must be unsubstituted or substituted with an inert group. Also the alcohol donor may be a primary or secondary alcohol or a glycol. The process is a catalytic one and is carried out in the presence of complexed iridium and rhodium catalysts of the following formulae: ##STR1## wherein: M is selected from Ir and Rh;

Process for the catalytic reduction of unsaturated ketones

Catalytic reduction of carbonyl compounds by transfer of hydrogen from alcohols to aliphatic, alicyclic, aromatic, homo- and heterocyclic ketones or aldehydes, catalyzed by rhodium or iridium complexes, characterized in that a primary or secondary alcohol of formula (I) or a glycol: ##STR1## is reacted with a ketonic compound of formula (II): ##STR2## in which R and R' and, respectively, R' and R'', optionally linked with each other according to homo- or heterocycles, indifferently represent a hydrogen atom or a hydrocarbyl group having up to 30 atoms of carbon, also substituted, provided that at least one of symbols R' and/or R'' is different respectively from R and/or R', in the presence of a complex catalyst of rhodium or of iridium selected from those having formulas (III) and (IV): ##STR3## wherein: M is selected from Rh and Ir;

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Trieste, Italy

Giovanni Mestroni