• CSIR - Central Salt & Marine Chemicals Research Institute
  • G20
team-img
logo
Dr. Srinu Tothadi
Group Member

Sr.Scientist

  • srinut@csmcri.res.in
  • 02782567760 Extn. 6670 | Ext:

Analytical and Environmental Science Division and Centralized Instrument Facility

Qualification
Academic Qualifications

Ph.D. (2014) Indian Institute of Science (IISc), Bangalore, India. MSc (2009)  Sri Venkateswara University Tirupati, India

Research
Research Activities

Chemical Crystallography, Single Crystal X-ray diffraction (SCXRD) and Design and Synthesis of Multicomponent Crystals. Cocrystals, Salts, Solvates, Hydrates, Pharmaceutical Cocrystals/salts and Polymorphs, Solid Forms, and Solid Solutions.

-|| Research Highlights ||-

Images

    1. N–H···O and C–H···O interaction mimicry in the 1:1 molecular complexes of 5,5- diethylbarbituric acid with urea and acetamide. Thakur, T. S.; Azim, Y.; Tothadi, S.; Desiraju, G. R. Curr. Sci.2010, 98, 794–802. (With cover page)
    2. Shape and size mimicry in the design of ternary molecular solids: Towards a robust strategy for crystal engineering. Tothadi, S.; Mukherjee, A.; Desiraju, G. R. Chem. Commun. 2011, 47, 12080–12082
    3. Triclabendazole: An intriguing case of co-existence of conformational and tautomeric polymorphism. Tothadi, S.; Bhogala, B. R.; Gorantla, A. R.; Thakur, T. S.; Jetti, R. K. R.; Desiraju, G. R. Chem. Asian J. 2012, 7, 330−342
    4. Unusual co-crystal of isonicotinamide: The structural landscape in crystal engineering. Tothadi, S.; Desiraju, G. R. Phil. Trans. R. Soc. A 2012, 370, 2900−2915
    5. 4-Hydroxybenzamide 1,4-dioxane hemisolvate. Tothadi, S.; Desiraju, G. R. Acta Crystallogr. 2012, E68, o2661.
    6. Polymorphs, Salts, and Cocrystals: What’s in a Name?. Aitipamula, S.; et al., Tothadi, S.; Vangala, V. R.; Variankaval, N.; Vishweshwar, P.; Weyna, D. R.; Zaworotko, M. J. Cryst. Growth Des. 2012, 12, 2147−2152.
    7. Crystal engineering in the Desiraju research group in Bangalore. Chakraborty, S.; Dubey, R.; Joseph, S.; Mishra, M. K.; Mukherjee, A.; Siddiqui K. A.; Tothadi, S.; Thakur, T. S.; Varughese S. Cryst. Growth Des. 2012, 12, 4688−4691.
    8. Synthon modularity in 4-hydroxybenzamide−dicarboxylic acid cocrystals. Tothadi, S.; Desiraju, G. R. Cryst. Growth Des. 2012, 12, 6188−6198.
    9. Synthon identification in co-crystals and polymorphs with I.R. spectroscopy. Primary amides as a case study. Mukherjee, A.; Tothadi, S.; Chakraborty, S.; Ganguly. S.; Desiraju, G. R. CrystEngComm, 2013, 15, 4640–4654.
    10. Synthon modularity in cocrystals of 4-bromobenzamide with n-alkanedicarboxylic acids: Type-I and type-II halogen···halogen interactions. Tothadi, S.; Joseph, S.; Desiraju, G. R. Cryst. Growth Des. 2013, 13, 3242–3254.
    11. Designing ternary cocrystals with hydrogen bonds and halogen bonds. Tothadi, S.; Desiraju, G. R. Chem. Commun. 2013, 49, 7791–7793.
    12. Salt and cocrystals of Sildenafil with dicarboxylic acids: Solubility and pharmacokinetic advantage of the glutarate salt. Sanphui, P.; Tothadi, S.; Ganguly, S.; Desiraju, G. R. Mol. Pharmaceutics, 2013, 10, 4687–4697
    13. Halogen Bonds in Crystal Engineering: Like Hydrogen Bonds yet Different. Mukherjee, A.; Tothadi, S.; Desiraju, G. R. Acc. Chem. Res. 2014, 47, 2514–2524
    14. Polymorphism in cocrystals of urea : 4,4'-bipyridine and salicylic acid : 4,4'-bipyridine.  Tothadi, S*. CrystEngComm, 2014, 16, 7587 –7597.  (*Corresponding author)
    15. Obtaining synthon modularity in ternary cocrystals with hydrogen bonds and halogen Bonds. Tothadi, S.; Sanphui, P.; Desiraju, G. R. Cryst. Growth Des. 2014, 14, 5293−5302
    16.  Combinatorial crystal synthesis of ternary solids based on 2-methylresorcinol. Mir, N. A. #;  Dubey, R. #; Tothadi, S. #; Desiraju, G. R. CrystEngComm, 2015, 17, 7866–7869. (# Equal contribution). HOT article
    17. Odd-even Alternation in Tautomeric Porous Organic Cages with Exceptional Chemical Stability. Bera, S.; Basu, A.; Tothadi, S.;  Garai, B.; Banerjee, S.; Vanka, K.; Banerjee, R. Angew. Chem. Int. Ed. 2017, 56, 2123-2126
    18. Modular assembly of porous organic cage crystals: isoreticular quasiracemates and ternary cocrystal. Tothadi, S.; Little, M. A.; Hasell, T.; Briggs, M. E., Chong, S.Y.;  Liu, M.; Cooper, A.I. CrystEngComm, 2017,19, 4933-4941
    19. Supramolecular Synthons in Bumetanide Cocrystals and Ternary Products  Allu, S.;  Bolla, G.; Tothadi, S. and Nangia A. Cryst. Growth Des.2017, 17, 4225−4236.
    20. Systematic Synthesis of Six Component Organic Salt Alloy of Naftopidil and Pentanary, Quaternary and Ternary Multicomponent Crystals. Dandela R.; # Tothadi S.;# Marelli, U. K. and Nangia, A. IUCrJ, 2018, 5, 816–822. (# Equal contribution).
    21.  C-F Bond Activation by Saturated NHC: Mesoionic Compound Formation and its Unprecedented Adduct with B(C6F5)3. Pait, M.; Kundu, G.; Tothadi, S.; Karak, S.; Jain, S.; Vanka K. and Sen, S.S.  Angew. Chem. Int. Ed. 2019, 58, 2804-2808.
    22. Porosity Switching in Polymorphic Porous Organic Cages with Exceptional Chemical Stability. Bera, S.; Dey, K.; Pal, T. K.; Halder, A.; Tothadi, S.; Karak, S.; Addicoat, M. and Banerjee, R. Angew. Chem. Int. Ed. 2019, 58, 4243-4247
    23. Does Stoichiometry Matter? Cocrystals of Aliphatic Dicarboxylic Acids with Isonicotinamide: Odd-even Alternation in Melting points. Tothadi, S.* and Phadkule, A. CrystEngComm, 2019, 21, 2481-2484.  (* Corresponding author)
    24. Saturated N-Heterocyclic Carbene based Thiele's Hydrocarbon with a etrafluorophenylene Linker. Kundu, G.; De, S.; Tothadi, S.; Das, A.; Koley, D. and Sen S. S. Chem.: Eur. J. 2019. 25, 16533-16537
    25.  Novel Pharmaceutical Cocrystals and Salts of Bumetanide Allu, S.; Bolla, G.; Tothadi, S. and Nangia A. Cryst. Growth Des. 2020, 20, 793-803.
    26. Morphological Evolution of Two Dimensional Porous Hexagonal Trimesic Acid Framework. Tothadi, S.; Koner, K.; Dey, K.; Addicoat, M. A. and Banerjee, R. ACS Appl. Mater. Interfaces 2020, 12, 15588-15594
    27. Naftopidil Molecular Salts with Improved Dissolution and Permeation. Mannava, M. K. C.; Dandela, R.; Tothadi, S.; Solomon K. A. and Nangia, A.K. Cryst. Growth Des. 2020, 20, 3064-3076.
    28. Bis(Silanetellurone) with C-H∙∙∙Te Interaction. Ghosh, M.; Panwaria, P.; Tothadi, S.; Das, A. and Khan, S. Inorg. Chem, 2020, 59, 17811−17821
    29. Stepwise Nucleophilic Substitution to Access Saturated N-Heterocyclic Carbene Haloboranes with Boron–Methyl Bonds. Kundu, G.; Pahar, S; Tothadi, S. and Sen, S. Organometallics 2020, 39, 4696–4703
    30. Can We Identify Salt-cocrystal Continuum State Using XPS? Tothadi, S.; Shaikh, T. R.; Dandela, R.; Vinod, C. P. and Nangia A. K. Cryst. Growth Des. 2021, 21, 735-747.
    31. Triazine-Based Janus G-C Nucleobase as a Building Block for SelfAssembly, Peptide Nucleic Acids, and Smart Polymers. Meena, C.L.; Singh, D.; Kizhakeetil, B.; Prasad, M.; George, M.; Tothadi, S. and Sanjayan, G. J. J. Org. Chem. 2021, 86, 3186-3195.
    32. Diverse reactivity of carbenes and silylenes towards fluoropyridines. Kundu, G.; Ajithkumar, V. S.; Bisai, M. K.; Tothadi, S.; Das, T.; Vanka, K. and Sen, S. S. Chem. Commun., 2021, 57, 4428.
    33. The diverse reactivity of NOBF4 towards silylene, disilene, germylene and stannylene Chem. Commun., 2021, 57, 5008. Parvin, N.; Sen, N.; Muhasin, P. V.; Tothadi, S.; Parameswaran P. and Khan, S.
    34. Synthesis and Application of Silylene-Stabilized Low-Coordinate Ag(I)–Arene Cationic Complexes. Parvin, N.; Sen, N.; Tothadi, S.; Muhammed, S.; Parameswaran, P. and Khan S. Organometallics 2021, 40, 1626−1632.
    35. Structure-property correlation of halogen substituted benzothiazole crystals. Thekkeppat, N. P.; Singla, L.; Tothadi, S.; Das, P.; Choudhury, A. R. and Ghosh S. J. Mol. Struct. 2021, 1243, 130765.
    36. Reactivity of (TMS)2N(η1-Cp*)Si═Si(η1-Cp*)N(TMS)2 toward the Halides of Groups 13–15 Sen, N.; Parvin, N.; Tothadi, S.; and Khan S. Organometallics 2021, 40, 1874–1883.
    37. Carbazole Substituted Amidinato Silylene: Synthesis, Bonding, and Coordination Behavior with Coinage Metals Ghosh, M.; Tothadi, S. and Khan S. Organometallics 2021, 40, 18, 3201–3210.
    38. Separation of a diastereomeric diol pair using the mechanical properties of crystals Gamidi, R.K.; Dandawate M.; Tothadi S.; Choudhury R.; Nangia A.K.; and Reddy, D. S. CrystEngComm, 2021, 23, 7056-7060.
    39. Three in One: Triple GCT Base-Coded Brahma Nucleobase Amino Acid: Synthesis, Peptide Formation, and Structural Features Wagh, M. A.; Maity, R.; Bhosale, R. J.; Semwal, D.; Tothadi, S.; Vaidhyanathan, R. and Sanjayan G. J. J. Org. Chem. 2021, 86, 15689−15694.
    40. Substitution at sp3 boron of a six-membered NHC·BH3: convenient access to a  dihydroxyborenium cation. Kundu G.; Ajithkumar V. S.; Raj K. V.; Vanka K.;  Tothadi S. and Sen, S. S. Chem. Commun., 2022, 58, 3783-3786
    41. Different mechanical responses of dimorphic forms of Anthracene Schiff base crystal. Lakshmipathi M.; Tothadi, S. Emmerling F.; Bhattachary, B. and Ghosh, S. J. Mol. Struct 2022, 1252, 132182
    42. Supramolecular Synthon Identification in Azelaic Acid – Isonicotinamide Cocrystal  by Solid-State NMR. Yaravaa, J. R.; Rao, L.; Pahari, P. B.; Tothadi, S. and Ramanath, K.V. J. Magn. Reson. Open 2022, 10-11, 100056.
    43. Nucleophilic Substitution at a Coordinatively Saturated Five-Membered NHC×Haloborane Centre.  Kundu G.; Tothadi S. and Sen, S. S. Inorganics 2022, 10, 97.

    1. S. Tothadi and R. Banerjee, A new solid porous form of trimesic acid and a process for preparation thereof       Pub. No.: US 10,730,820 B2, Pub. Date: Aug 20, 2020
    2. G. R. Desiraju, S. Ganguly, A. Mukherjee, S. Tothadi, S. Chakraborty. Supramolecular synthon identification with vibrational spectroscopy. Patent No. : 354084 application no. 5465/CHE/2012. Granted on 19/12/2020
  • • Crystal Engineering: Design and synthesis of multicomponent crystals (Cocrystals and Salts) • Polymorphism in Active Pharmaceutical Ingredients (APIs). • The role of hydrogen bonds and halogen bonds in host-guest chemistry via Cocrystallization • Application of pharmaceutical cocrystals/salts/solvates/hydrate. • Design of porous organic materials and their cocrystals: Application in gas storage. • Synthesis of organic alloys • Structure-property relationship in organic crystals.
  • Chemical Crystallography, Single Crystal X-ray diffraction (SCXRD) and Design and Synthesis of Multicomponent Crystals. Cocrystals, Salts, Solvates, Hydrates, Pharmaceutical Cocrystals/salts and Polymorphs, Solid Forms, and Solid Solutions.
  • Others