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All Journal Chemistry Indonesian Journal of Chemical Research Makara Journal of Science
Bohari M. Yamin
Low Carbon Energy Research Group, School of Chemical Sciences and Food Technology, Faculty Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor
Biochemistry, Genetics & Molecular Biology Chemistry Engineering Environmental Science

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CRYSTAL STRUCTURE OF [Bis(DIMETHYLFORMAMIDE) Bis(2,2’-PYRIDYL)QUINOLINE)IRON(II)]Bis-(TETRAPHENYLBORATE) Jahro, Iis Siti; Onggo, Djulia; Ismunandar, Ismunandar; Rahayu, Susanto Imam; Yamin, Bohari M.
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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Abstract

The goal of this research is to obtain single crystal and structural information of iron(II) complex with 2,(2’- pyridyl)quinoline(pq) ligands. The reaction of iron(II) salt with 2,(2’-pyridyl)quinoline ligand and sodium tetraphenylborate in the molar ratio of 1:3:2 in methanol-N,N-dimethylformamide(dmf) solution results in an iron(II) complex. The formula of the [Fe(pq)2(dmf)2](BPh4)2 complex has been obtained from the iron(II) and C, H, N contents. Single crystal of [Fe(pq)2(dmf)2](BPh4)2 suitable for X-ray investigation was obtained by evaporation of the complex solution in N,N-dimethylformamide at room temperature after 24 hours. This compound crystallizes in monoclinic system with C2/c space group, a = 27.950(4), b = 14.169(7), c = 17.717(9) Å and β = 105.669(11)°. The structure consist of iron(II) is chelated by two pq ligands through the N atoms and two dmf molecules in a six-coordination environment. The charge of the [Fe(pq)2(dmf)2] 2+ cation is balanced by two tetraphenylborate (BPh4) - anions.
Complexation of 5,5,7,12,12,14-Hexamethyl-1,4,8,11-Tetraazayclotetradeca-7,14-Dienium Bromide With Copper Acetate In Methanol And Aqueous Solutions Yamin, Bohari M.; Kadir, Aisyah; Yusoff, Siti F. M.
Indonesian Journal of Chemical Research Vol 2 No 2 (2015): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2015.2-boh

Abstract

5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclodeca-7,14-dienium bromide disolvate ((Me6N4H4)Br2.2H2O) is a 14-membered deprotonated tetraaza macrocyclic salt. Its neutral analogues and their complexes were prepared by templation method under refluxed condition since it was discovered by Curtis in 1961. However, the present diprotonated tetraaza salts react with many metallic salts in both methanolic and aqueous solutions. The complexation involved deprotonation of the diagonally opposite protonated amines and the type of metal salt and solvents also play an important role in the final complex formation. The complexation of (Me6N4H4)Br2.2H2O with copper acetate in methanol and aqueous solutions gave the expected complex of [Cu((Me6N4H2)Br]Br.2H2O. Pseudo-first order condition for the complexation reaction in water was established.
Co-Authors Djulia Onggo Iis Siti Jahro Ismunandar Kadir, Aisyah Susanto Imam Rahayu Yusoff, Siti F. M.