1,417 research outputs found
Reactions of a phosphinito bridged diplatinum(I) complex with coinage metal electrophiles
No full textWe have recently described the synthesis of the complex
[(PHCy2)Pt1(m-PCy2){k2P,O-m-P(O)Cy2}Pt2(PHCy2)] (Pt-Pt)
(1), the first unsymmetrical phosphinito bridged Pt(I) species.[1]
The phosphinito bridge differentiates the charge distributions on
the two platinum atoms as confirmed by NMR spectroscopy
(dPt(1) = -4798 ppm, dPt(2) = -5207 ppm) and DFT studies. Complex
1 shows a rich chemistry as it reacts with nucleophiles [PHCy2,
PCy3, P(S)HCy2],[2] protic species HX [P(OH)Cy2, PhSH, HF,
HCl, HBr, HI, HBF4],[3, 4] and small molecules such as H2.[5]
Recently, we started investigations on the reactivity of complex 1
towards Au and Ag based electrophiles.
In this communication, it will be shown that, differently
from the isolobal H+ (which attacks the phosphinito oxygen and
migrates onto the Pt-Pt bond),3 the [Ag(PPh3)]+ electrophile
attacks complex 1 selectively to the Pt2-mP bond to afford the
cationic cluster [(PHCy2)Pt1(m-PCy2){k2P,O-m-P(O)Cy2}Pt2{m-
-Ag(PPh3)}(PHCy2)]+ (Pt–Pt) (2+) in which the [Ag(PPh3)]+
moiety bridges the mP-Pt2 bond. Analogous reactivity is observed
also when phosphane free electrophiles such as AgOTf, AgBF4,
AgClO4 and AgCl are used. Moreover, the reactivity of 1 towards
Au(I) electrophiles such as AuCl and [Au(PPh3)Cl] was dependent
on the reagent and on the experimental conditions.
references:
1. Gallo, V.; Latronico, M.; Mastrorilli, P.; Nobile, C. F.;
Suranna, G. P.; Ciccarella, G.; Englert, U.; Eur. J. Inorg.
Chem., 2005, 4607–4616.
2. Gallo, V.; Latronico, M.; Mastrorilli, P.; Nobile, C. F.;
Polini, F.; Re, N.; Englert, U.; Inorg. Chem., 2008, 47,
4785–4795.
3. Latronico, M.; Polini, F.; Gallo, V.; Mastrorilli, P;
Calmuschi-Cula B.; Englert, U.; Re, N.; Repo T.,
Raisanen M.; Inorg. Chem., 2008, 47, 9979-9796.
4. M. Latronico, P. Mastrorilli, V. Gallo, M.M.Dell’Anna,
F. Creati, N. Re, U. Englert, Inorg. Chem. 2011, 50,
3539–3558
5. Mastrorilli P., Latronico M., Gallo V., Polini F., Re N.,
Marrone A., Gobetto R., Ellena S.. J. Am. Chem. Soc.
2010, 132, 4752–476
Synthesis and activity of -Fe2O3 nanoparticles in the catalytic reduction of halonitroarenes under sustainable conditions
No full textAbstract.
The catalytic reduction of nitroarenes towards anilines is an important reaction from both academic
and industrial points of view, being the resulting products important intermediates to produce dyes,
agrochemicals, pigments, and pharmaceuticals. In addition, removal of nitroarene pollutants from
water by reducing them into anilines is a valuable method to purify contaminated matrices. Such
reductive reactions are frequently carried out by using noble metal catalysts [1], which are usually
very active and recyclable in some cases. Recently, the use of earth abundant metal catalysts has
gained great interest especially for economic reasons, as these materials are generally cheap and
easy to be reached [2]. In this framework, iron oxides catalysts are very attractive because they are
cheap and not toxic. Herein, we report on the synthesis of α-Fe2O3 nanoparticles (NPs) of size
ranging from 50 to 80 nm starting from a porous organic polymer (POP) containing Fe(III) sites,
which was in turn annealed at 400°C. The obtained NPs were characterized by SEM-EDX, XRPD,
IR and TXRF and were employed as active and recyclable catalysts in the reduction of p-bromonitrobenzene into p-bromo-aniline, using hydrazine hydrate in ethanol, taken as the model reaction.
[1] Dell’Anna, M.M.; Intini, S.; Romanazzi, G.; Rizzuti, A.; Leonelli, C.; Piccinni, F.; Mastrorilli,
P. J. Mol. Catal. A: Chem. 2014, 395, 307–314.
[2] Romanazzi, G.; Fiore, A.M.; Mali, M.; Rizzuti, A.; Leonelli, C.; Nacci, A.; Mastrorilli, P.;
Dell'Anna, M. M. Mol. Catal., 2018, 446, 31–3
La promessa di matrimonio nella recente giurisprudenza
No full textIl saggio "la promessa di matrimonio nella recente giurisprudenza" appunta l'attenzione sulla evoluzione giurisprudenziale in tema analizzandone i profili significativi alla luce dell'intervenute modificazioni del costume sociale e della percezione comune del c.d. "fidanzamento ufficiale" e dei suoi effetti
I nuovi diritti dei consumatori nel codice del consumo. Relazione al convegno Percorsi giurisprudenziali baresi del 28 aprile 2015 presso il palazzo di Giustizia di Bari. relazione disponibile per la consultazione degli avvocati del foro di Bari.
No full textLA RESPONSABILITA' CONTRATTUALE PER DIFETTO DEL SOFTWARE "2000 INCOMPATIBILE" (ED. PROVVISORIA)
No full textIL CONTRATTO INFORMATICO ONNICOMPRENSIVO COME CONTRATTO UNITARIO APPRODA ALLA CORTE SUPREMA: IL PUNTO DI ARRIVO DI UNA LUNGA EVOLUZIONE (NOTA A CASS., 22 MARZO 1999,N.2661)
No full textDISPENSE IN DIRITTO DELLA CONTRATTAZIONE A DISTANZA (legalmente depositate ai sensi della l. 2004 n. 106).Disponibili presso le biblioteche della Ex facoltà di Economia della Università degli Studi di Bari "A. Moro". Attualmente presso le biblioteche del Dipartimento di Economia, Management e Diritto dell'impresa, ad uso e consultazione degli studenti per preparazione dell'esame di Diritto della contrattazione a distanza.
No full text
DISPENSE IN DIRITTO PRIVATO DEI CONSUMI (legalmente depositate ai sensi della l. 2004 n. 106). Depositate presso le biblioteche della ex Facoltà di Economia della Università degli Studi di Bari "A. Moro" ad uso preparazione esame in Diritto privato dei consumi. Base della prossima monografia sul tema.
No full text- …
