S. Suma

Synthesis, characterization and physiochemical information, along with antimicrobial studies of some metal complexes derived from an ON donor semicarbazone ligand

Eight new transition metal complexes of benzaldehyde-N(4)-phenylsemicarbazone have been synthesized and characterized by elemental analyses, molar conductance, electronic and infrared spectral studies. In all the complexes, the semicarbazone is coordinated as neutral bidentate ligand. (1)H NMR spectrum of [Zn(HL)(2)(OAc)(2)] shows that there is no enolisation of the ligand in the complex. The magnetic susceptibility measurements indicate that Cr(III), Mn(II), Fe(III), Co(II) and Cu(II) complexes are paramagnetic and Ni(II) is diamagnetic. The EPR spectrum of [Mn(HL)(2)(OAc)(2)] in DMF solution at 77K shows hyperfine sextet with low intensity forbidden lines lying between each of the two main hyperfine lines. The g values calculated for the [Cu(HL)(2)SO(4)] complex in frozen DMF, indicate the presence of unpaired electron in the d(x)(2) - (y)(2) orbital. The metal ligand bonding parameters evaluated showed strong in-plane sigma bonding and in-plane pi bonding. The ligand and complexes were screened for their possible antimicrobial activities.

Spectral, thermal, structural, dielectric and microhardness studies of gel grown diaquasuccinatocadmium(II) hemihydrate

Diaquasuccinatocadmium(II) hemihydrate (DSCH) single crystals were grown successfully by single gel diffusion technique at room temperature. Block shaped crystals of size 11 mm × 6 mm × 3 mm have been obtained in 24 days. The grown crystals were colorless and transparent. The crystalline nature and reflection planes of the sample were confirmed by the powder X-ray diffraction technique. The crystal structure of the DSCH crystal was determined by single crystal X-ray diffraction technique. According to microanalytical results the formula of the crystal is [Cd(C(4)H(4)O(4))H(2)O](2)·0.5H(2)O. Fourier Transform Infrared (FT-IR) and Fourier Transform Raman (FT-Raman) studies were used to confirm the presence of various functional groups in the crystal. The thermal behavior of the crystal was studied by simultaneous TGA-DTA methods in nitrogen atmosphere. The mechanical strength of the grown crystal was estimated by Vickers microhardness test. The dielectric behavior of the sample was also studied.

Cribriform adenocarcinoma of minor salivary gland: A mimic of polymorphous low-grade adenocarcinoma.

Adenocarcinoma is relatively less common on the tongue.[1] Polymorphous low‐grade adenocarcinoma (PLGA) is a malignant tumor of minor salivary glands which is slow growing and carries a low metastatic potential. Histologically, PLGA exhibits a spectrum of growth patterns such as cribriform, tubular, trabecular, fascicular and solid structures. Concentric whorls forming target‐like patterns are noted as prominent finding. The nuclear features appear to be bland. Invasion of the perineural spaces and other adjacent tissues is typical. Despite this invasive growth pattern of PLGA, the overall prognosis remains to be favorable.[2,3]

(2E)-2-Benzyl­idene-N-phenyl­hydrazinecarboxamide

The molecule of the title compound, C14H13N3O, adopts an E conformation with respect to the azomethine C=N bond, and is roughly planar, with an r.m.s. deviation of the non-H atoms from the least-squares plane of 0.100 (2) Å and a dihedral angle between the terminal benzene rings of 5.74 (12)°. An intramolecular N—H⋯N hydrogen bond closes an S(6) ring. In the crystal, molecules are linked by the pairs of N—H⋯O hydrogen bonds into centrosymmetric dimers. Dimers related by translation along [010] form slanted stacks, the shortest C⋯C intermolecular distance within the stack being 3.283 (3) Å. Weak C—H⋯π interactions link the stacks into a three-dimensional structure.

CCDC 1531839: Experimental Crystal Structure Determination

Related Article: A. Asha, A. Sheena Mohan, S. Suma, M.R. Sudarsanakumar, M.R. Prathapachandra Kurup|2017|J.Mol.Struct.|1141|299|doi:10.1016/j.molstruc.2017.03.106

Glandular odontogenic cyst: Analysis of clinicopathological features of five cases

Glandular odontogenic cyst (GOC) is a rare developmental cystic lesion of the jaws accounting for 0.012%–0.3% of all the odontogenic cysts. It occurs most commonly in middle-aged men, especially in the anterior mandible. It clinically presents as a slow-growing intraosseous lesion. Small cysts may be asymptomatic while larger ones may cause expansion with pain or paresthesia. Radiographically, it frequently presents as a multilocular radiolucency. Microscopic features are characterized by nonkeratinized stratified squamous epithelium of variable thickness with many microcystic or pseudoglandular spaces and plaque-like extensions. Although its microscopic features are characteristic, few situations may arise where this entity may be confused with dentigerous, botryoid odontogenic, radicular cyst, and central mucoepidermoid carcinoma. The importance of GOC relates to its high rate of recurrence making its diagnosis important. The purpose of this study is to present the clinicopathological features of five cases of GOC which have been reported in our institution.

Poly[tetraaquatriglutaratodicerium(III) decahydrate], a novel luminescent metal-organic framework possessing hydrophilic hexagonal channels

AbstractA novel 2D metal–organic framework poly[tetraaquatriglutaratodicerium(III) decahydrate] with an open framework structure has been successfully grown by single gel diffusion technique. Sodium metasilicate was used for gel preparation. The structure was determined by single crystal X-ray diffraction. The compound crystallizes in orthorhombic space group Pnma and possesses a structure consisting of [CeO10] polyhedra and H2O molecules with hydrophilic hexagonal channels. The crystals were further characterized by elemental analysis, FT-IR and UV-Visible spectroscopy, powder X-ray diffraction and thermogravimetry. The luminescent property and magnetic susceptibility of the complex were also investigated. Graphical AbstractSingle crystals of a new 2D metal–organic framework, poly[tetraaquatriglutaratodicerium(III) decahydrate] with an open framework structure has been grown by single gel diffusion technique. The compound crystallizes in orthorhombic crystal system, space group Pnma. Single crystal X-ray diffraction study revealed the polymeric structure of the compound. One of the interesting characteristics of the structure is the presence of hydrophilic hexagonal channels. The luminescence and magnetic susceptibility of the complex were also studied.