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Thahira Begum S. A. Ravoof
Universiti Putra Malaysia
61Publications
9H-index
270Citations
Publications 63
Newest
#1Enis Nadia Md Yusof (University of Newcastle)H-Index: 3
#2Muhammad Alif Mohammad Latif (UPM: Universiti Putra Malaysia)H-Index: 6
Last.Thahira Begum S. A. Ravoof (UPM: Universiti Putra Malaysia)H-Index: 9
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Abstract Six new tin(IV) compounds derived from tridentate dinegatively charged ONS dithiocarbazate Schiff bases derived from 2-hydroxy-3-methoxybenzaldehyde (H2L1, H2L2 and H2L3) and 2,3-dihydroxybenzaldehyde (H2L4, H2L5 and H2L6) (where H2Ln = di-acids of Schiff base) are reported. The compounds were characterised by elemental analysis, FT-IR and multinuclear NMR (1H, 13C and 119Sn) spectroscopy. The crystal structures of tin(IV) [S-4-methybenzyl-β-N-(2-hydroxy-3-methoxybenzylmethylene)dithioc...
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#1Nurul N.M. Ishak (UPM: Universiti Putra Malaysia)
#2Junita Jamsari (UPM: Universiti Putra Malaysia)H-Index: 1
Last.Thahira Begum S. A. Ravoof (UPM: Universiti Putra Malaysia)H-Index: 9
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Abstract Four new mixed-ligand Ni(II) complexes (1–4) containing imidazole (im) or benzimidazole (bz) and tridentate Schiff bases derived from 2,4-dihydroxybenzaldehyde (24D) and 4-methyl-3-thiosemicarbazide (MT24D) or 4-phenyl-3-thiosemicarbazide (PT24D) were synthesised and characterised using elemental and spectral analysis including FTIR, UV–Vis, 1H NMR, 13C NMR and mass spectrometry for Schiff bases, while the complexes were additionally analysed using ICP-OES, molar conductivity, magnetic ...
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In the title hydrazinecarbodi­thio­ate derivative, C27H26N2O2S2, the asymmetric unit is comprised of four mol­ecules (Z = 8 and Z′ = 4). The 4-meth­oxy­phenyl rings are slightly twisted away from their attached olefinic double bonds [torsion angles = 5.9 (4)–19.6 (4)°]. The azomethine double bond has an s-trans configuration relative to one of the C=C bonds and an s-cis configuration relative to the other [C=C—C= N = 147.4 (6)–175.7 (2) and 15.3 (3)–37.4 (7)°, respectively]. The torsion angles b...
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#1Enis Nadia Md Yusof (University of Newcastle)H-Index: 3
#2Nazhirah Muhammad Nasri (UPM: Universiti Putra Malaysia)
Last.Edward R. T. Tiekink (Sunway University)H-Index: 53
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The title CuII complex, [Cu(C13H11N2OS2)2], features a trans-N2S2 donor set as a result of the CuII atom being located on a crystallographic centre of inversion and being coordinated by thiol­ate-S and imine-N atoms derived from two di­thio­carbazate anions. The resulting geometry is distorted square-planar. In the crystal, π(chelate ring)–π(fur­yl) [inter-centroid separation = 3.6950 (14) A and angle of inclination = 5.33 (13)°] and phenyl-C—H⋯π(phen­yl) inter­actions sustain supra­molecular la...
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#1N. Arif Tawfeeq (University of Anbar)H-Index: 1
#2Huey Chong Kwong (UPM: Universiti Putra Malaysia)H-Index: 3
Last.Thahira Begum S. A. Ravoof (UPM: Universiti Putra Malaysia)H-Index: 9
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In the title bis­chalcone, C17H12Br2O, the olefinic double bonds are almost coplanar with their attached 4-bromo­phenyl rings [torsion angles = −10.2 (4) and −6.2 (4)°], while the carbonyl double bond is in an s-trans conformation with with respect to one of the C=C bonds and an s-cis conformation with respect to the other [C=C—C=O = 160.7 (3) and −15.2 (4)°, respectively]. The dihedral angle between the 4-bromo­phenyl rings is 51.56 (2)°. In the crystal, mol­ecules are linked into a zigzag chai...
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The title NiII complex, Ni(L)(LH2) (1), where LH2 is S-2-methybenzyl-β-N-(2-hydroxy-3-methoxybenzylmethylene) dithiocarbazate, was isolated from the reaction of Ni(acetate)2·4H2O and two molar equivalents of LH2. The complex was characterized by elemental analysis, spectroscopy (IR and UV) as well as by a single-crystal X-ray structure determination. The nickel(II) center is coordinated within a cis-NOS2 donor set that defines a square planar geometry. Three donor atoms, i.e., N, O, and S, are p...
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Six new organotin(IV) compounds of Schiff bases derived from S-R-dithiocarbazate [R = benzyl (B), 2- or 4-methylbenzyl (2M and 4M, respectively)] condensed with 2-hydroxy-3-methoxybenzaldehyde (oVa) were synthesised and characterised by elemental analysis, various spectroscopic techniques including infrared, UV-vis, multinuclear (1H, 13C, 119Sn) NMR and mass spectrometry, and single crystal X-ray diffraction. The organotin(IV) compounds were synthesised from the reaction of Ph2SnCl2 or Me2SnCl2 ...
3 CitationsSource
#1Enis Nadia Md Yusof (University of Newcastle)H-Index: 3
#2Edward R. T. Tiekink (Sunway University)H-Index: 53
Last.Thahira Begum S. A. Ravoof (UPM: Universiti Putra Malaysia)H-Index: 9
view all 6 authors...
Abstract A light-yellow crystalline product (1), which was isolated after one week from the filtrate of the reaction between S-2-methylbenzyldithiocarbazate and 2,3-dihydroxybenzaldehyde, was characterised by single crystal X-ray diffraction, FTIR and NMR spectroscopic analyses. The experimental molecular structure of 1 has been established by X-ray crystallography and showed, to a first approximation, a planar C2N2S2 + dihydroxyphenyl region that has an almost orthogonal relationship to the rin...
1 CitationsSource
C18H21N3O2, triclinic, P¯1 (no. 2), a=8.5155(4) A, b=10.6415(4) A, c=19.0732(10) A, α=80.918(4)°,
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