Viswanathan Baskar

University of Hyderabad

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E. Carolina Sañudo

Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona

Uppara Ugandhar

University of Hyderabad

Tokala Navaneetha

University of Hyderabad

S. Mondal

Synthetic Biologics (United States)

Pilli V.V.N. Kishore

Amrita Institute of Medical Sciences and Research Centre

Ananda Kumar Jami

GITAM University

Amaleswari Rasamsetty

Indian Institute of Technology Bombay

Nagarjuna Kumar Srungavruksham

National Taiwan University

J. Ali

University of Hyderabad

Calvin Samuel

University of Hyderabad

Cooperative Institutions

University of Hyderabad

University of Manchester

Indian Institute of Technology Bombay

Indian Institute of Technology Kanpur

Centre National de la Recherche Scientifique

Engineering and Physical Sciences Research Council

University of Liverpool

University of Edinburgh

Universidad de Zaragoza

University of Mumbai

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CCDC 920331: Experimental Crystal Structure Determination

The Cambridge Structural Database (2013)

Nagarjuna Kumar Srungavruksham Viswanathan Baskar

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/cczwp3m

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Discrete Molecular Aggregates Based on Zn^II and Sb^III/V Ions Displaying Efficient Antibacterial and Antioxidant Properties

Inorganic Chemistry (2023)

Tokala Navaneetha Ashif Ali Ch. V. Ramana Viswanathan Baskar

The reactions of [Zn3Cl2(3,5-Me2PzH)4(t-BuPO3)2] with organostibonic acid in varying reaction conditions have been investigated. Single-crystal X-ray diffraction studies reveal the formation of [Zn2(p-ClC6H4Sb)2(O)2(OCH3)2(t-BuPO3)3(py)2] (1), [Zn2(p-ClC6H4SbV)4(SbIII)2(O)8(t-BuPO3H)4(t-BuPO3)2(py)2Cl2] (2), and [Zn2(RSb)4(O)4(OCH3)4(t-BuPO3)4(py)2], where R = p-ClC6H4 (3) and R = p-iPrC6H4 (4), respectively. Interestingly, in the synthesis of 2, complete dearylation of organoantimony moieties followed by C–F bond formation, a reduction from Sb (V) to Sb (III), and Sb···Cl weak intermolecular interactions have been observed. ESI-MS studies suggested that clusters 1–4 maintained their structural integrity in the solution state also. Solution NMR studies (1H, 31P, and 13C) support well the observed solid-state structures. 1–4 were tested for antibacterial activity using a microdilution assay. 1 and 4 showed the best activity with lower MIC values (0.78–6.25 μg/mL) against all the tested pathogens. The total antioxidant activity of 1–4 was evaluated through the phosphomolybdenum assay, which showed a total antioxidant activity ranging from 28.96 to 86.46 mg AAE/g compound with the ascorbic acid standard.

Oxidation state

10.1021/acs.inorgchem.3c00247

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Stibonic acids and related stibonate-phosphonate clusters: Synthesis, characterization and bioactivity evaluation

Journal of Inorganic Biochemistry (2022)

J. Ali Mohamad Mosa Mubarak Calvin Samuel Hadiya Amin Kantroo Abbass Malik

Phosphonate

Azobenzene

10.1016/j.jinorgbio.2022.111909

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Citations (4)

CCDC 984499: Experimental Crystal Structure Determination

The Cambridge Structural Database (2015)

Pilli V.V.N. Kishore Amaleswari Rasamsetty E. Carolina Sañudo Viswanathan Baskar

10.5517/cc121g1m

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CCDC 940893: Experimental Crystal Structure Determination

The Cambridge Structural Database (2013)

Ananda Kumar Jami Viswanathan Baskar E. Carolina Sañudo

10.5517/cc10l2d2

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Synthesis of a Tetranuclear Organooxotin Cage by Debenzylation Reactions: X-ray Crystal Structure of [(PhCH₂)₂Sn₂O(O₂P(OH)-t-Bu)₄]₂

Organometallics (2002)

Vadapalli Chandrasekhar Viswanathan Baskar Alexander Steiner Stefano Zacchini

The reactions of (PhCH2)2SnCl2, (PhCH2)2SnO·H2O, and (PhCH2)3SnCl with 2 equiv of t-BuP(O)(OH)2 afford the tetranuclear organooxotin cage [(PhCH2)2Sn2O(O2P(OH)-t-Bu)4]2 (4) in good yields. The formation of the half-cage intermediate [(PhCH2)2Sn2O(O2P(OH)-t-Bu)4] (4a) en route to 4 has been detected by 119Sn and 31P NMR. The molecular structure of compound 4 as determined by single-crystal X-ray analysis shows a tetranuclear cage structure containing two Sn−O−Sn motifs connected by bridging [t-BuP(OH)(O)2]- ligands. The solid-state structure of 4 is retained in solution.

Cage

10.1021/om020531r

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Organoantimony(V) Phosphinates, Phosphonates, and Seleninates

European Journal of Inorganic Chemistry (2013)

Nagarjuna Kumar Srungavruksham Viswanathan Baskar

Abstract The reaction of polymeric triphenylantimony oxide with various protic ligands like phenylphosphinic acid, diphenylphosphinic acid, tert ‐butylphosphonic acid, and phenylseleninic acid has been investigated. Single‐crystal X‐ray structural elucidation revealed the formation of [Ph 3 Sb(HPhPO 2 ) 2 ] 2 ( 1 ), [Ph 3 Sb(Ph 2 PO 2 ) 2 ] ( 2 ), [Ph 3 Sb( tert ‐BuPO 3 H) 2 ] ( 3 ), [Ph 3 Sb(PhSeO 2 ) 2 ] 2 ( 4 ), and [(Ph 3 Sb) 2 (μ‐O)(μ‐PhSeO 2 ) 2 ] ( 5 ), respectively. Hydrolysis and dearylation of 3 yielded [(Ph 2 Sb) 2 (PhSb)(μ 3 ‐O)(μ 2 ‐O) 2 (OH) 2 (μ‐ t BuPO 3 ) 2 {(C 2 H 5 ) 4 N} 2 ] ( 6 ) possessing in situ generated Ph 2 Sb(O)(OH) and PhSbO 3 H 2 moieties. The 31 P NMR spectrum of 1 shows P–H three‐bond coupling seen for the first time in organophosphorus‐based compounds. Further 31 P NMR spectroscopy at lower temperatures revealed 1 to be a fluxional molecule. 77 Se NMR spectroscopy indicates the formation of different molecular clusters from crystallization processes carried out under varying solvent conditions.

10.1002/ejic.201300348

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Citations (17)

CCDC 2196008: Experimental Crystal Structure Determination

The Cambridge Structural Database (2022)

S. Mondal Calvin Samuel Viswanathan Baskar

10.5517/ccdc.csd.cc2cq3z6

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CCDC 2102611: Experimental Crystal Structure Determination

The Cambridge Structural Database (2022)

S. Mondal Smruti Prangya Behera Mohammed Alamgir Viswanathan Baskar

10.5517/ccdc.csd.cc28ky5z

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A New Structural Form of Tin in a Double O-Capped Cluster

Journal of the American Chemical Society (2003)

Vadapalli Chandrasekhar Viswanathan Baskar Jagadese J. Vittal

A novel hexameric organooxotin cage [{(n-BuSn)3(PhO)3O}2{HPO3}4] 1 has been assembled by the reaction of [n-BuSnO(OH)] with (PhO)2P(O)H. The structure of 1 consists of two O-capped Sn3 clusters that are attached to each other by four bridging tripodal [HPO3]2- ligands.

10.1021/ja0287478

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Citations (47)