Room temperature molecular and lattice structures of a homologous series of anhydrous zinc(II) n-alkanoate

Taylor, Richard A.; Ellis, Henry A.

doi:10.1016/j.saa.2006.11.007

Cited by 31 publications

(25 citation statements)

References 22 publications

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“…21 Also, according to the same authors, the zinc-carboxylate bond is favored for short-chain carboxylates (with up to nine carbons), resulting in a stronger interaction between metal atoms, leading to the splitting of absorption bands.…”

Section: Resultsmentioning

confidence: 96%

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Isopropyl Octanoate Synthesis Catalyzed by Layered Zinc n-Octanoate

Maruyama¹,

Kanda²

2016

J. Braz. Chem. Soc.

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Isopropyl octanoate is an ester used in the formulation of cosmetics, foods, medicines, and other products. The peculiar thermodynamic and kinetic factors, allied with the demand for the applications mentioned above, justify the development of an optimized process for its synthesis. In the present article, the esterification of octanoic acid with isopropanol while using zinc n-octanoate as catalyst is reported. A factorial design was employed where variables such as molar ratio (alcohol:acid), percentage of catalyst (in relation to the acid mass) and temperature were investigated. It was observed that zinc octanoate showed promising catalytic activity, especially at 165 °C, with molar ratios of 8:1 and 6:1, and with 7 and 10% of catalyst, where conversions up to 75% were observed. Optimized conditions for the production of isopropyl octanoate were determined to be 165 °C, 6:1 molar ratio and 5.97% of catalyst.

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Section: Resultsmentioning

confidence: 96%

“…21 Therefore, the layer formation occurs by interaction of oxygen atoms present at the end of the carboxylate with a distinct metallic zinc center.…”

Section: Resultsmentioning

confidence: 99%

Isopropyl Octanoate Synthesis Catalyzed by Layered Zinc n-Octanoate

Maruyama¹,

Kanda²

2016

J. Braz. Chem. Soc.

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“…A summary of all the ν as , ν s , and ∆ν data for metal octanoate synthesized in our laboratory is presented in Table 2. Investigated metal octanoates have a ∆ν in the region of 135 -155 cm −1 that testifies to the ionic bidentate mode of coordination [8].…”

Section: Properties Of Metal Octanoatesmentioning

confidence: 90%

“…The important carbonyl absorptions that point to a possible molecular structure are the asymmetric stretch, ν as (COO) ≈ 1570 -1560 cm −1 , and the symmetric stretch, ν s (COO) ≈ 1425 -1410 cm −1 . Additionally, the frequencies and relative positions of the symmetric and asymmetric bands (∆ν = ν as − ν s ) are interpreted by several authors as indicative of carboxylate-metal ion coordination [8,10,11]. For example, the frequency shifts of these bands relative to those of the free carboxylate ion depend on metal to Compound Frequencies of main IR bands, cm −1 ligand coordination.…”

Section: Properties Of Metal Octanoatesmentioning

confidence: 99%

Phase Diagrams of Mesogenic Binary Systems of Cobalt(II) and Univalent Metal Octanoates

Tokmenko

Mirnaya

Yaremchuk

2011

Zeitschrift Für Naturforschung A

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The phase diagrams of binary systems of cobalt(II) octanoate and lithium, sodium, potassium, and thallium(I) octanoates have been studied by differential thermal analysis and polythermal polarization microscopy. In all systems, continuous or limited liquid crystalline solutions of smectic modification are formed. The temperature and composition ranges of the formation of liquid crystals and glasses have been determined.

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“…Os resultados obtidos na determinação do perfil de ácidos graxos do EZ por CG são apresentados na Tabela 8 Ambos os espectros de IVTF confirmam a presença de íons carboxilato e, ambos os difratogramas de raios X são coerentes com a estrutura de carboxilatos lamelares. Sendo assim, embora possivelmente a composição química em ácidos graxos do EZ tenha sido alterada durante o processo catalítico, um carboxilato lamelar foi recuperado após o uso do EZ na glicerólise do óleo de palma.…”

Section: Caracterização Dos Carboxilatos Lamelaresunclassified

Preliminary Studies of Glycerolysis of Palm Oil Catalyzed by Layered Carboxylates

Cordeiro

Gomes

2017

Rev. Virtual Quim.

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Abstract:The monoglycerides are traditionally produced from the glycerolysis of vegetable oils using alkaline catalysts in homogeneous medium and high temperatures, resulting in a material contaminated with soap and bitter taste. In this work the commercial zinc stearate (EZ) was used as a new heterogeneous catalyst for the glycerolysis of palm oil. It was possible to obtain a mixture of glycerides, with similar chemical composition to industrially obtained by the traditional method, when the experiments were conducted at 170° C with molar ratio glycerol: oil of 2: 1 for 2 h with 5% catalyst. EZ was characterized before and after use by X-ray diffraction and infrared spectroscopy with Fourier transform and was observed to maintain the lamellar structure after the reactions.Keywords: Glycerolysis; layered carboxylates; palm oil. ResumoOs monoacilgliceróis tradicionalmente são produzidos a partir da glicerólise de óleos vegetais utilizando catalisadores alcalinos em meio homogêneo e elevadas temperaturas, resultando em um material contaminado com sabões e com sabor amargo. Neste trabalho o estearato de zinco comercial (EZ) foi utilizado como um novo catalisador heterogêneo para a glicerólise do óleo de palma. Foi possível obter uma mistura de acilgliceróis, com composição química semelhante a obtida industrialmente pelo método tradicional, quando os experimentos foram conduzidos a 170°C, com razão molar glicerol:óleo de 2:1, por 2 h com 5% de catalisador. O EZ foi caracterizado antes e após o uso por difração de raios X e espectroscopia de infravermelho com transformada de Fourier, tendo sido observa a manutenção da estrutura lamelar após as reações.Palavras-chave: Glicerólise; carboxilatos lamelares; óleo de palma.

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Room temperature molecular and lattice structures of a homologous series of anhydrous zinc(II) n-alkanoate

Cited by 31 publications

References 22 publications

Isopropyl Octanoate Synthesis Catalyzed by Layered Zinc n-Octanoate

Isopropyl Octanoate Synthesis Catalyzed by Layered Zinc n-Octanoate

Phase Diagrams of Mesogenic Binary Systems of Cobalt(II) and Univalent Metal Octanoates

Preliminary Studies of Glycerolysis of Palm Oil Catalyzed by Layered Carboxylates

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