Search results for "DILI"
showing 10 items of 427 documents
La casa gotica
1997
Chi ha paura del piano-casa?
2009
L'edilizia economica a Palermo fra le due guerre: il"casamento" come risposta meliorista al problema dell'abitazione a basso costo
2011
Chiral Lanthanocene Derivatives Containing Two Linked Amido−Cyclopentadienyl Ligands: Heterobimetallic Structure and Lactone Polymerization Activity
1997
Reaction of 2 equiv of dilithium amido−cyclopentadienide Li2(C5R4SiMe2NCH2CH2X) (C5R4 = C5Me4, C5H3tBu; X = OMe, NMe2) with anhydrous LnCl3 (Ln = Y, Lu) gave C2-symmetric complexes of the type Li[Ln(η5:η1-C5R4SiMe2NCH2CH2X)2] containing a heterobimetallic core. The molecular structure of Li[Y(η5:η1-C5Me4SiMe2NCH2CH2OMe)2] was determined by single-crystal X-ray structural analysis, which showed it to exhibit both a pseudotetrahedral yttrium as well as a tetrahedral lithium center. In accordance with a formal 20-electron configuration at the rare earth metal center Ln, the amido-nitrogen atoms are shown to be pyramidalized. In the case of Li[Y(η5:η1-C5H3tBuSiMe2NCH2CH2X)2], mixtures of the tw…
Zirconium and hafnium mono(alkyl) complexes containing a tridentate linked amido-tetramethylcyclopentadienyl ligand. Molecular structure of Hf(η5:η1:…
1998
Abstract Zirconium and hafnium complexes M( η 5 : η 1 : η 1 -C 5 Me 4 SiMe 2 NCH 2 CH 2 OMe)Cl 2 (M=Zr, Hf) containing the tridentate 2-methoxyethylamido-functionalized tetramethylcyclopentadienyl ligand C 5 Me 4 SiMe 2 NCH 2 CH 2 OMe have been synthesized by the reaction of the dilithium derivative Li 2 [C 5 Me 4 SiMe 2 NCH 2 CH 2 OMe] with MCl 4 (THF) 2 . Selective monoalkylation of the dichloro complexes gave complexes of the type M( η 5 : η 1 : η 1 -C 5 Me 4 SiMe 2 NCH 2 CH 2 OMe)(R)Cl (R=CH 2 Ph, o -C 6 H 4 CH 2 NMe 2 ). The crystal structure of the hafnium dichloro complex Hf( η 5 : η 1 : η 1 -C 5 Me 4 SiMe 2 NCH 2 CH 2 OMe)Cl 2 has been determined by X-ray crystal diffraction and sho…
Georges Candilis, architettura in divenire - Habitat adapté, climatique, évolutif
2014
la tesi ricostruisce le radici della sostenibilità architettonica, proponendo un'indagine sulla nascita della nozione di Habitat in seno ai CIAM e sullo sviluppo apportato dal Team 10. Lo studio della produzione di Candilis ( figura centrale del team 10) getta luce su alcune tematiche centrali per la progettazione architettonica contemporanea quali i rapporti tra: architettura/ambiente, locale/globale, identità/molteplicità,apertura/compimento dell'opera architettonica The thesis reconstructs the roots of the architectural sustainability proposing an investigation about the birth of the concept of habitat within the CIAM and their development by Team 10. The study of the production of Candi…
The Durability of Composite Wood-Steel Systems
2010
Nell’ambito della valutazione e del controllo della qualità tecnologica in edilizia, la conoscenza del comportamento nel tempo dei prodotti e componenti complessi per l’edilizia, risulta aspetto fondamentale, in particolare per quei prodotti tecnologicamente “innovativi” per i quali la normativa non prevede ancora prove specifiche per valutarne la durabilità. In particolare, oggi risulta sempre più diffuso l’impiego di sistemi assemblati o con connessioni tra materiali di diversa natura, tra cui i sistemi legno-acciaio, ottenuti rinforzando le travi in legno lamellare con piastre in acciaio forate, incollati mediante una resina epossidica bicomponente. Tali sistemi, che sono stati già ogget…
Il nuovo condono edilizio e la "complicata" cooperazione tra Stato e Regioni.
2004
Il nuovo condono edilizio e la "complicata" cooperazione tra Stato e Regioni.
Costruzioni incompiute tra manutenzione e manutenibilità
2021
Unfinished constructions represent a contemporary unresolved problem, especially in the Italian scenario. Despite the different type, original intended use and location, the reinforced concrete used as structural material denotes a common distinctive feature of these constructions. In recent decades, this phenomenon has been the object of scandal campaigns, mostly referred to public Administrations. By contrast, various publications and exhibitions have extensively investigated the potentials of unfinished constructions, arousing the interest of academics and designers. Nevertheless, on an operational level the issue still appears unsolved. Indeed, the incomplete constructions bring up tech…
1,1-Diphenyl-4-(thiophen-2-yl)but-3-yn-1-ol
2018
The asymmetric unit of the title homopropargyl alcohol, C20H16OS, contains two independent molecules comprising a hydroxy group, a 3-(2-thiophenyl)- propargylic moiety and two aromatic rings linked to a central carbon atom. The two unique molecules are linked into a dimer by an O—HO hydrogen bond. In one molecule, the thiophene ring is disordered over two orientations rotated by 180 with a refined occupancy ratio of 0.575 (4):0.425 (4). The crystal structure is stabilized by O—H and C—H hydrogen-bond interactions. The crystal studied was a two-component non-merohedral twin, the refined ratio of the twin components being 0.575 (4):0.425 (4). UCR::Vicerrectoría de Docencia::Ciencias Básicas::…