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102 results on '"Palyi, G"'

2. Chemoselectivity in cyclosiloxanolate cluster formation: An alkali cation effect?

Author

Zucchi, C, Mattioli, M, Gavioli, G, Moret, M, Sironi, A, Ugo, R, Pizzotti, M, Shchegolikhina, O, Palyi, G, MORET, MASSIMO, Palyi, G., Zucchi, C, Mattioli, M, Gavioli, G, Moret, M, Sironi, A, Ugo, R, Pizzotti, M, Shchegolikhina, O, Palyi, G, MORET, MASSIMO, and Palyi, G.

Abstract

The Cu4 derivatives of [EtSiO2]Na have been synthesised and their cyclic voltammetry, spectroscopic behaviour and X-ray structure determination described. The changes in the alkali cation, Na+ in place of K+, might have a 'tuning' effect in the organisation on the siloxanolate clusters resulting in a macrocyclic ([EtSiO2]12) ligand instead of two cyclic ([EtSiO2]6) ligands.

Published
2000

3. (Phthalimidomethyl)- and (phenoxymethyl)cobalt carbonyls. Equilibria of CO insertion

Author

Nagygergely, I, Szalontai, G, Ungvary, F, Marko, L, Moret, M, Sironi, A, Zucchi, C, Sisak, A, Tschoerner, C, Martinelli, A, Sorkau, A, Palyi, G, NagyGergely, I, Palyi, G., Nagygergely, I, Szalontai, G, Ungvary, F, Marko, L, Moret, M, Sironi, A, Zucchi, C, Sisak, A, Tschoerner, C, Martinelli, A, Sorkau, A, Palyi, G, NagyGergely, I, and Palyi, G.

Abstract

Phthalimidomethyl and phenoxymethyl as well as corresponding acetyl cobalt tetracarbonyls (1-4) were prepared and characterized. The single-crystal X-ray diffraction molecular structure of 1 (the first X-ray structure of an alkylcobalt tetracarbonyl with a pure organic alkyl group) was determined. The equilibrium constants of the equilibria 1 half arrow pointing right over half arrow pointing left 2 and 3 half arrow pointing right over half arrow pointing left 4 were determined at 20-60 and 20-40 degrees C, respectively

Published
1997

4. MODELS OF RHODIUM COMPLEXES BOUND TO SILICA - PREPARATION, STRUCTURE, AND INTERCONVERSION OF DINUCLEAR (SILYLOXY)RHODIUM COMPLEXES

Author

Viziorosz, A, Ugo, R, Psaro, R, Sironi, A, Moret, M, Zucchi, C, Ghelfi, F, Palyi, G, VIZIOROSZ, A, UGO, R, PSARO, R, SIRONI, A, ZUCCHI, C, GHELFI, F, PALYI, G., MORET, MASSIMO, Viziorosz, A, Ugo, R, Psaro, R, Sironi, A, Moret, M, Zucchi, C, Ghelfi, F, Palyi, G, VIZIOROSZ, A, UGO, R, PSARO, R, SIRONI, A, ZUCCHI, C, GHELFI, F, PALYI, G., and MORET, MASSIMO

Published
1994

7. O-SILYLATION OF ACYLCOBALT TETRACARBONYLS - SYNTHESIS OF A NEW TYPE OF DINUCLEAR MU-2-HYDROXYCARBENE COBALT CARBONYL DERIVATIVES

Author

Sisak, A, Sironi, A, Moret, M, Zucchi, C, Ghelfi, F, Palyi, G, SISAK, A, SIRONI, A, MORET, MASSIMO, ZUCCHI, C, GHELFI, F, PALYI, G., Sisak, A, Sironi, A, Moret, M, Zucchi, C, Ghelfi, F, Palyi, G, SISAK, A, SIRONI, A, MORET, MASSIMO, ZUCCHI, C, GHELFI, F, and PALYI, G.

Abstract

O-Silylation of acylcobalt tetracarbonyls, RC(O)Co(CO)4, gives the dinuclear carbene complexes [{mu-2-RC(OSiR'3)}(mu-2-CO)Co2(CO)6], of which one derivative (R = Me, R' = Ph) was characterized by X-ray diffraction.

Published
1991

14. Progress in biological chirality

Author

Palyi, G. (Gyula), 1936, Zucchi, C. (Claudia), 1964, Caglioti, Luciano., Palyi, G. (Gyula), 1936, Zucchi, C. (Claudia), 1964, and Caglioti, Luciano.

Published
2004

27. Cobalt-Catalyzed Carbonylation of Benzyl Halides Using Polyethylene Glycols as Phase-Transfer Catalysts

Author

Zucchi, C., Palyi, G., Galamb, V., Sampar-Szerencses, E., Marko, L., Alper, H., and Li, P.

Abstract

Hydroxycarbonylation of benzyl and substituted benzyl chloride and bromide derivatives was achieved in good yields (up to 97.6%) and quantitative chemoselectivity, in the presence of Co2(CO)8 as the transition metal and polyethylene glycols as the phase-transfer catalyst in an organic solvent/20% aqueous NaOH two-phase system under mild conditions (1 bar CO, room temperature). η1-Benzyl-, η3-benzyl-, and (η1-phenylacetyl)cobalt carbonyls were investigated as intermediates of this catalytic process.

Published
1996

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