101 research outputs found
On Nina Bandelj and Frederick F. Wherry (2011): The Cultural Wealth of Nations
The authors of this volume investigate their posed questions about the cultural wealth of nations by relying on the traditions of Viviana A. Zelizer and Alejandro Portes, who had ‘visions of an economic sociology that enfolds culture and development into its core’ (p. x.). Cultural economic sociology seeks to analyze the effects that culture, cultural differences and cultural heritage can have on economies through using sociological methods and theories to dissect how (intentionally or unintentionally) cultural advantages/cultural wealth can contribute to economic growth and local development
Synthesis and X-ray Crystal Structure of <i>N</i>,<i>N</i>-Bis[(<i>S</i>)-1-phenylethyl]-(<i>R</i>,<i>R</i>)-4,5- diamino-1,7-octadiene
Synthesis and X-ray Crystal Structure of
N,N-Bis[(S)-1-phenylethyl]-(R,R)-4,5-
diamino-1,7-octadien
Novel Organometallic Building Blocks for Molecular Crystal Engineering. 3. Synthesis, Characterization, and Hydrogen Bonding of the Crystalline Mono- and Bis-Amide Derivatives of [Co<sup>III</sup>(η<sup>5</sup>-C<sub>5</sub>H<sub>4</sub>-COOH)<sub>2</sub>]<sup>+</sup> and of the Cationic Zwitterion [Co<sup>III</sup>(η<sup>5</sup>-C<sub>5</sub>H<sub>4</sub>CONHC<sub>5</sub>H<sub>4</sub>NH)(η<sup>5</sup>-C<sub>5</sub>H<sub>4</sub>COO)]<sup>+</sup>
The synthesis and structural characterization of the molecular complexes [CoIII(η5-C5H4CONHC5H4N)2][PF6] (1), [CoIII(η5-C5H4CONHC5H4NH)(η5-C5H4COO)][PF6] (2), and of the supramolecular adducts [CoIII(η5-C5H4CONHC5H4N)2][Fe(η5-C5H4COOH)2][PF6] (3) and [CoIII(η5-C5H4COO)2](-)[(C16H9CH2NH3)](+) (4) are reported together
with an investigation of the hydrogen-bonding interactions in the solid state. Compound [CoIII(η5-C5H4CONHC5H4NH)(η5-C5H4COO)](+) has been described as a cationic zwitterion in view of the charge separation arising from
deprotonation of the carboxylic group and protonation of the pyridine moiety on the parent compound [CoIII(η5-C5H4CONHC5H4N)(η5-C5H4COOH)]+. The complex forms a supramolecular dimer via charge-assisted N−H···O
hydrogen bonds, topologically analogous to the mixed metal supramolecular complex [CoIII(η5-C5H4CONHC5H4N)2](+)[Fe(η5-C5H4COOH)2], which has also been prepared and characterized. The differences in hydrogen bonding have
been analyzed
X−H---π (X = O, N, C) Hydrogen Bonds in Organometallic Crystals
The intermolecular interactions between X−H
donors (X = C, N, O) and electron-rich π-ligands
(alkynes, arenes, and cyclopentadienyl ligands) in crystalline organometallic complexes have been investigated
from data retrieved from the Cambridge Structural
Database. Intermolecular X−H---π interactions are
weak hydrogen bonds following the common order of
acidity HOH > HNH > HCH but
become more effective
packing determinants when “charge-assisted” by the
presence of an ionic charge
(X−Hδ+---πδ-)
Co-Crystals and Salts Obtained from Dinitrogen Bases and 1,2,3,4-Cyclobutane Tetracarboxylic Acid and the Use of the Latter As a Template for Solid-State Photocyclization Reactions
The synthesis, isolation, and characterization of a series
of co-crystals
and adducts of 1,2,3,4-cyclobutane tetracarboxylic acid (H<sub>4</sub>CBTC) with the dinitrogen bases 1,2-bis(4-pyridyl)ethane (BPA) and
1,2-bis(4-pyridyl)ethylene (BPE), respectively, are reported. The
thermal stability and interconversion process between the dihydrated
salt [BPAH<sub>2</sub>][H<sub>2</sub>CBTC]·2H<sub>2</sub>O and
its dehydration product and the use of this latter to obtain the neutral
co-crystal [BPA]<sub>2</sub>·[H<sub>4</sub>CBTC] have been investigated.
The products obtained with 1,2-bis(4-pyridyl)ethylene (BPE), namely,
the salt [BPEH][H<sub>3</sub>CBTC] and the co-crystal [BPE]<sub>2</sub>·[H<sub>4</sub>CBTC] are prearranged in space so as to be able
to react photochemically yielding <i>rctt</i>-tetrakis(4-pyridyl)cyclobutane
(TPCB). Recrystallization from ethanol of the photocyclization products
yields the channeled structure of the solvated co-crystal [TPCB]·[H<sub>4</sub>CBTC]·EtOH
Tuning the Solubility of the Herbicide Bentazon: from Salt to Neutral and to Inclusion Complexes
We report on the
mechanochemical synthesis of inclusion complexes
obtained by reacting the neutral crystalline herbicide bentazon (HBtz)
with native cyclodextrins (CDs). The reaction of HBtz with γ-CD
resulted in the formation of the inclusion complexes [β-CD·HBtz]·6H2O and [γ-CD·HBtz]·8H2O, which were
characterized via a combination of X-ray diffraction, Fourier transform
infrared (FTIR) spectroscopy, and calorimetric measurements. No complexation,
on the contrary, was achieved upon the reaction of HBtz with α-CD.
The salt NaBtz·1.75H2O, widely used as a water-soluble
salt of bentazon for the manufacturing of agrochemicals, was also
synthesized and structurally characterized, and its solubility and
dissolution properties were compared to those of neutral HBtz and
of the β-CD and γ-CD inclusion complexes. It was found
that the behavior of [β-CD·HBtz]·6H2O and
[γ-CD·HBtz]·8H2O in water is similar, with
dissolution rates of 28.4 ng·L–1·min–1 and 39.8 ng·L–1·min–1, respectively, and is intermediate between those
of NaBtz·1.75H2O (228 ng·L–1·min–1) and neutral bentazon (3.5 ng·L–1·min–1). These results were
also compared with those of the dehydrated inclusion complexes, which
displayed intermediate dissolution rates between hydrous complexes
and NaBtz·1.75H2O. All findings indicate that the
inclusion of HBtz in β-CD and γ-CD might represent a viable
alternative for the preparation of environmentally friendly agrochemicals
with controlled bentazon release to be used in the formulation of
herbicides
Co-Crystals and Salts Obtained from Dinitrogen Bases and 1,2,3,4-Cyclobutane Tetracarboxylic Acid and the Use of the Latter As a Template for Solid-State Photocyclization Reactions
The synthesis, isolation, and characterization of a series
of co-crystals
and adducts of 1,2,3,4-cyclobutane tetracarboxylic acid (H<sub>4</sub>CBTC) with the dinitrogen bases 1,2-bis(4-pyridyl)ethane (BPA) and
1,2-bis(4-pyridyl)ethylene (BPE), respectively, are reported. The
thermal stability and interconversion process between the dihydrated
salt [BPAH<sub>2</sub>][H<sub>2</sub>CBTC]·2H<sub>2</sub>O and
its dehydration product and the use of this latter to obtain the neutral
co-crystal [BPA]<sub>2</sub>·[H<sub>4</sub>CBTC] have been investigated.
The products obtained with 1,2-bis(4-pyridyl)ethylene (BPE), namely,
the salt [BPEH][H<sub>3</sub>CBTC] and the co-crystal [BPE]<sub>2</sub>·[H<sub>4</sub>CBTC] are prearranged in space so as to be able
to react photochemically yielding <i>rctt</i>-tetrakis(4-pyridyl)cyclobutane
(TPCB). Recrystallization from ethanol of the photocyclization products
yields the channeled structure of the solvated co-crystal [TPCB]·[H<sub>4</sub>CBTC]·EtOH
Intriguing Case of <i>Pseudo</i>-Isomorphism between Chiral and Racemic Crystals of rac- and (<i>S</i>)/(<i>R</i>)2-(1,8-Naphthalimido)-2-quinuclidin-3-yl, and Their Reactivity Toward I<sub>2</sub> and IBr
Condensation
reactions between 1,8-naphthalic anhydride and racemic
3-aminoquinuclidine or chiral (S) or (R)-(−)-3-aminoquinuclidine allowed preparation of three novel
racemic and enantiopure aza-donor ligands, namely NMiABCO (1), (S)NMiABCO (2a), and (R)NMiABCO (2b).
Racemic NMiABCO (1) crystallizes in the monoclinic space
group P21/c, Z′ = 1, while enantiopure (S)NMiABCO (2a) and (R)NMiABCO (2b) crystallize in the chiral monoclinic
space group P21, Z′
= 2, and show significant pseudocentrosymmetry, being pseudo-isomorphous with racemic NMiABCO (1). Reactivity of
both racemic and enantiopure NMiABCO toward iodine and interhalogen
IBr was also investigated as a way to remove the pseudoisomorphism,
yielding the three new molecular adducts [NMiABCO·I2] (3), [(S)NMiABCO·I2]·xCHCl3 (4), [(S)NMiABCO·IBr]·xCHCl3 (5) and the molecular salt
[HNMiABCO][IBr2] (6). Synthesis of complexes 3 and 4 was also carried out in the solid state
via kneading and vapor digestion techniques. All compounds were fully
characterized via single crystal and powder X-ray diffraction and
Raman spectroscopy
Hydrogen Bonds within an Ionic Environment: The Remarkable Behavior of the Zwitterion [Co<sup>III</sup>(η<sup>5</sup>-C<sub>5</sub>H<sub>4</sub>COOH)(η<sup>5</sup>-C<sub>5</sub>H<sub>4</sub>COO)]
The organometallic zwitterion [CoIII(η5-C5H4COOH)(η5-C5H4COO)] forms a hydrogen-bonded supramolecular adduct with the cationic acid [CoIII(η5-C5H4COOH)2]+ in the solid state and shows self-organization around K+ cations in the mixed system
{[CoIII(η5-C5H4COOH)(η5-C5H4COO)]2}[K]+[PF6]-
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