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Indonesian Journal of Chemistry

ijc
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Published by Universitas Gadjah Mada

ISSN : 14119420 EISSN : 24601578 DOI : -

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry

Indonesian Journal of Chemistry is an International, peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry including applied chemistry. The journal is accredited by The Ministry of Research, Technology and Higher Education (RISTEKDIKTI) No : 21/E/KPT/2018 (in First Rank) and indexed in Scopus since 2012. Since 2018 (Volume 18), Indonesian Journal of Chemistry publish four issues (numbers) annually (February, May, August and November).

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Articles 17 Documents

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Search results for , issue "Vol 12, No 2 (2012)" : 17 Documents clear

SYNTHESIS OF ZINC-DIFATTYALKYLDITHIOCARBAMATES AND THEIR ANTIOXIDANT ACTIVITIES Komar Sutriah; Zainal Alim Mas’ud; Tun Tedja Irawadi
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

Zinc-difattyalkyldithiocarbamates are organosulfur compounds with many functions, including as an antioxidant in a lubrication system. They were synthesized by reacting secondary fatty amine with ZnCl2 and CS2 giving result zinc-difattyalkyldithiocarbamates of around 77-87%. The synthesized products were characterized using infrared (IR) spectroscopic techniques. The IR spectra of zinc-difattyalkyldithiocarbamates showed sharp bands at 1450-1550 cm-1 for thioureida v (C-N), 950-1050 cm-1 for v (C-S), and in the far-red area 300-400 cm-1 for sulfur-metal bond. Products recovery was evaluated by AAS and the purity was analyzed by HPLC. Seven variants of zinc-difattyalkyldithiocarbamates were obtained. Antioxidant activity was evaluated by rancimat test regarding their induction time. At 125 ppm levels all variants showed higher value in each of their induction time as compared to those of butylated hydroxyanisole and butylated hydroxytoluene, commercial antioxidants No.1, and commercial antioxidants no.2. Three variants, i.e. Zn-bis(dilauryl)dithiocarbamate, Zn-bis(laurylpalmityl)dithiocarbamate, and Zn-bis(laurylstearyl)dithiocarbamate had higher values in their induction time than the other variants. The values are 16.67, 26.54, and 16.11 h, respectively.

KINETIC INVESTIGATION OF CARBON DIOXIDE, ACETIC ACID, ACRYLIC ACID FORMATION ON DILUTED AND LEACHED MoVTeNb CATALYST Restu Kartiko Widi
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

Reaction kinetics for the oxidation of propane over diluted-leached MoVTeNb is described. This paper is focused on the study of determination of the orders of carbon dioxide, acetic acid and acrylic acid formation. Deep oxidation of propane to carbon dioxide is first order with respect to hydrocarbon, and partial order (0.31) with respect to oxygen. The selective oxidation of propane to acrylic acid is partial order (0.49) with respect to hydrocarbon and partial order (0.09) with respect to oxygen.

RAPID SOLVENT-FREE MICROWAVE ASSISTED SYNTHESIS OF SOME N’-BENZYLIDENE SALICYLIC ACID HYDRAZIDES Tutuk Budiati; Stephanie D.A.; Elisabeth Catherina Widjajakusuma
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

Condensation reaction has been carried out for the synthesis of some N'-benzylidene-2-hydroxybenzohydrazides using microwave assisted solvent-free method. The structures of all the products obtained in the present work are supported by spectral and analytical data (UV, IR, and 1H-NMR spectroscopy). The desired hydrazides are in 62-80% yields under microwave irradiation. The reaction was completed in 8-10 min.

AN ESTER OF 4-METHOXY CYNNAMIC ACID ISOLATED FROM Xylocarpus moluccencis (Lamk) M. Roem (MELIACEAE) Tukiran Tukiran; Septiani Setyo Cahyasari; Kuniyoshi Shimizu
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

An ester derivative of 4-methoxycynnamic acid, i.e. 2-ethylhexyl 4-methoxy cynnamate was isolated for the first time from the chloroform extract of stem bark of Xylocarpus moluccencis (Lamk) M. Roem) (Meliaceae) along with β-sitosterol and stigmasterol. The first structure was elucidated with the help of various spectroscopic techniques, including IR, GC-MS, and NMR spectra. Two last structures were determined by comparison with the reported compounds in literature. These compounds were also found in the hexane extract of the plant.

KINETICS STUDY ON NITRATION OF METHYL RICINOLEATE Abdullah Abdullah; Triyono Triyono; Wega Trisunaryanti; Winarto Haryadi
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

Kinetics parameter values of methyl ricinoleate nitration (rate constant, reaction order and the rate of reaction) have been determined. Nitration was carried out with both concentrations of HNO3 and acetic anhydride in excess to the concentration of methyl ricinoleate. Thus, the kinetics parameter value was only affected by the concentration of methyl ricinoleate. Based on kinetic study conducted, it could be concluded that the nitration follows pseudo first-order, and the reaction rate for methyl ricinoleate with initial concentration of 0.375, 0.325 and 0.250 M were 3.736 x 10-5, 2.471 x 10-5, and 1.724 x 10-5 M/s respectively, with the rate constant at 28 °C was 6.667 x 10-4 (s-1). Based on evaluation of FTIR spectra could be estimated that the nitration produces compounds containing functional groups of -NO3 and -NO2.

SYNTHESIS AND ANTIPLASMODIAL ACTIVITY TESTING OF (1)-N-ALKYL- AND (1)-N-BENZYL-6-NITRO-1,10-PHENANTHROLINIUM SALTS AS NEW POTENTIAL ANTIMALARIAL AGENTS Ruslin Hadanu; Sabirin Mastjeh; Jumina Jumina; Mustofa Mustofa; Eti Nurwening Sholikhah; Mahardika Agus Wijayanti
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

The synthesis of 5-nitro-1,10-phenanthroline hydrate 2 derivatives from 1,10-phenanthroline monohydrate as starting material has been carried out. The 5-nitro-1,10-phenanthroline hydrate 2 was obtained through nitration reaction using H2SO4 and HNO3 as catalyst and reagent, respectively. Synthesis of (1)-N-alkyl-6-nitro- and (1)-N-benzyl-6-nitro-1,10-phenanthrolinium have been prepared using dimethyl sulphate (DMS), diethyl sulphate (DES), benzyl chloride, benzyl bromine, and benzyl iodide. The reagents of benzyl bromine, and benzyl iodide were synthesized from benzyl chloride using NaBr in ethanol absolute and NaI in acetone, respectively. The five compounds of 5-nitro-1,10-phenanthroline hydrate 2 derivatives were conducted to evaluate the in vitro antiplasmodial activity. The in vitro antiplasmodial was evaluated on strains of Plasmodium falciparum FCR-3 resistant chloroquine and D10 sensitive chloroquine. The 50% inhibition concentration (IC50) of the five compounds ranged from 2.41±1.41 to 0.07±0.01 μM. The results showed that the (1)-N-benzyl-6-nitro-1,10-phenanthrolinium iodide had highest antiplasmodial activity.

SYNTHESIS OF 2-METHOXY-4,6-DI(PROP-1-ENYL)PHENOL FROM EUGENOL AND ITS ACTIVITY AS AN ANTIOXIDANT Hernawan Hernawan; Bambang Purwono; Tutik Dwi Wahyuningsih
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

Synthesis and antioxidant activity of 2-methoxy-4,6-di(prop-1-enyl) phenol from eugenol have been investigated. Synthesis was conducted through three stages of reaction. The first step was CTAB micellar catalytic O-allylation reaction at room temperature, to give 4-allyl-1-(allyloxy)-2-methoxybenzene (2). Compound (2) was subsequently heated for Claisen rearrangement and produced 2,4-diallyl-6- methoxyphenol (3). The final steps was isomerization of compound (3) in alkaline conditions in ethylene glycol, to yield 2-methoxy-4,6-di(prop-1-enyl) phenol (4). Antioxidant activity test was conducted by TBARS and DPPH methods. TBARS test showed that the compound (4) at a concentration of 50 μM could inhibit the oxidation of linoleic acid shown by the increasing of time lag phase (96 ± 2.94 min), reducing the rate of propagation (± 54.54%) and reducing of malonal dialdehyde (MDA) formation (68.04 ± 0.84%). The DPPH test revealed that compound (4) indicated DPPH free radical scavenging activity with IC50 107.66 μM and comparable with IC50 for BHT 107.37 μM.

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