Silver(I) Dicyanonitrosomethanide, Ag[ONC(CN)2] complex as catalyst for the selective oxidation of styrene to benzaldehyde / Mohammad Anwar Mohamed Iqbal … [et al.]

Mohamed Iqbal, Mohammad Anwar and Nazri, Muhammad Zulhelmi and Ahmad, Mohammad Norazmi and Abdullah, Erna Normaya and Mohamad Haziz, Umi Fatihah and Razali, Mohd Rizal and Adam, Farook (2020) Silver(I) Dicyanonitrosomethanide, Ag[ONC(CN)2] complex as catalyst for the selective oxidation of styrene to benzaldehyde / Mohammad Anwar Mohamed Iqbal … [et al.]. Science Letters, 14 (2). pp. 71-84. ISSN (eISSN) 2682-8626

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Abstract

Silver(I) dicyanonitrosomethanide, Ag[ONC(CN)2] represent a 3D interwoven coordination polymer organization in which all the donor atoms of the functional groups of ONC(CN)2 - are coordinated to the Ag(I). Oxidation of styrene utilizing H2O2 as an oxidant in acetonitrile (CH3CN) was used as a model reaction to investigate the catalytic potential of the Ag(I) complex. The CH3CN was chosen as the solvent based on the data collected from Conductor like Screening Model for Real Solvents (COSMO-RS) study. The data indicate that the Ag[ONC(CN)2] complex was compatible and soluble in CH3CN. Different parameters such as styrene:H2O2 molar ratio, reaction time, catalyst mass, and reaction temperature were studied. Highest styrene conversion (36%) with 100% selectivity towards benzaldehyde (BZ) was achieved when 25 mg catalyst, 1:1 styrene to H2O2 molar ratio were used. The reaction was carried out at 303 K for 3 h. The catalytic conversion of styrene to BZ is proposed to take place via [Ag-H2O2] adduct with styrene oxide (StO) as an intermediate. Molecular Electrostatic Potential (MEP) shows that the Ag atom has the highest probability to coordinate with the oxygen atom of H2O2. The MEP data confirms the proposed mechanism.

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Item Type: Article
Creators:
Creators
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Mohamed Iqbal, Mohammad Anwar
UNSPECIFIED
Nazri, Muhammad Zulhelmi
UNSPECIFIED
Ahmad, Mohammad Norazmi
UNSPECIFIED
Abdullah, Erna Normaya
UNSPECIFIED
Mohamad Haziz, Umi Fatihah
UNSPECIFIED
Razali, Mohd Rizal
UNSPECIFIED
Adam, Farook
UNSPECIFIED
Subjects: Q Science > QD Chemistry > Physical and theoretical chemistry > Chemical elements
Q Science > QD Chemistry > Physical and theoretical chemistry > Conditions and laws of chemical reactions
Q Science > QD Chemistry > Physical and theoretical chemistry > Conditions and laws of chemical reactions > Catalysis
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Applied Sciences
Journal or Publication Title: Science Letters
UiTM Journal Collections: UiTM Journal > Science Letters (ScL)
ISSN: (eISSN) 2682-8626
Volume: 14
Number: 2
Page Range: pp. 71-84
Item ID: 47117
Uncontrolled Keywords: Styrene oxidation; Silver(I) dicyanonitrosomethanide; COSMO-RS; Molecular electrostatic potential (MEP)
URI: https://ir.uitm.edu.my/id/eprint/47117

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47117

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