Publications

  • Organometallics, 2024
    Halide assisted electrophilic C-H activation in aqueous acid and salt solutions for the synthesis of Ru(III)-abnormal-NHC complexes

Journal Articles

  • Shahid, N.; Budhija, V.; Singh, A. K. Halide assisted electrophilic C-H activation in aqueous acid and salt solutions for the synthesis of Ru(III)-abnormal-NHC complexes. Organometallics, 2024, 43, 2243-2255. (Invited contribution to the special issue: Celebrating the 25th Anniversary of the Chemical Research Society in India)
  • Kumar, N; Yadav, D.; Indari, O.; Varshney, N.; Singh, A. K.; Jha, H. C.; Mukhopadhyay, S.; Misra, S. Design, Synthesis and Evaluation of Photophysical and Biological Properties of Tetrafluoroacridine. ChemistrySelect, 2024, 9, e202401477. (Author share link)
  • Srivastava, N.; Meena, R.; Singh, A. K. Phosphine-free Ru(II)-CNC pincer complexes with mixed protic- and classical-NHCs in the same molecule for hydrogen production via oxidant-free benzyl alcohol dehydrogenation to benzoic acids. New J. Chem., 2024, 48, 17071–17082.
  • Shahid, N.; Singh, A. K. Unravelling the kinetics of electro- and photochemical S→O linkage isomerization in Ru(II)-NHC-DMSO complexes utilised for photoinduced substitution reactions. Dalton Trans., 2024, 53, 12662-12675.
  • Srivastava, N.; Singh, A. K. Protic- or anionic-NHCs with classical-NHC in a single [Ru(CNC)(PPh3)2Cl]Cl pincer complex: Direct comparison of structure & electronic properties and heterolytic H2 splitting. Dalton Trans., 2024, 53, 6870-6874. (Communication)
  • Nath, S.; Yadav, E.; Raghuvanshi, A.; Singh, A. K. Mechanistic Insights and Comparative Analysis of Ru(II)-NNC Pincer Complexes with Anionic-, Protic-, and Classical-NHCs for Transfer Hydrogenation of Ketones. Catal. Sci. Technol., 2023, 13, 7085.
  • Singh, R. K.; Yadav, D.; Misra, S.; Singh, A. K. Role of Ancillary Ligands in Selectivity Towards Acceptorless Dehydrogenation versus Dehydrogenative Coupling of Alcohols and Amines Catalyzed by Cationic Ruthenium(II)-CNC Pincer Complexes. Dalton Trans., 2023, 58, 15878.
  • Singh, R. K.; Yadav, D.; Singh, A. K. Cationic Ruthenium(II)-CNC Pincer Complexes as Phosphine-free Catalysts for Nitrile Hydration to Amides in Aqueous Medium. Mol. Catal., 2023, 549, 113523.
  • Srivastava, N.; Shahid, N.; Singh, A. K. Insights into the effect of contact ion-pairs on C-H bond activation for the synthesis of Ru(III)-NHC complexes: A combined experimental and computational study. J. Organomet. Chem., 2023, 998, 122802. (Preprint version – free access)
  • Nath, S.; Yadav, E.; Raghuvanshi, A.; Singh, A. K. Ru(II) Complexes with Protic- and Anionic-Naked-NHC Ligands for Cooperative Activation of Small Molecules. Chem. Eur. J., 2023, 29, e202301971. (Author share link)
  • Shahid, N.; Singh, R. K.; Srivastava, N.; Singh, A. K. Base-Free Synthesis of Benchtop Stable Ru(III)-NHC Complexes from RuCl3·3H2O and Their Use as Precursors for Ru(II)-NHC Complexes. Dalton Trans., 2023, 52, 4176. (Preprint version – free access)
  • Yadav, D.; Singh, R. K.; Misra, S.; Singh, A. K. Ancillary Ligand Effects and Microwave-Assisted Enhancement on the Catalytic Performance of Cationic Ruthenium(II)-CNC Pincer Complexes for Acceptorless Alcohol Dehydrogenation. Appl. Organomet. Chem. 2022, 36, e6756. (Author share link)
  • Singh, R. K.; Khan, T. K.; Misra, S.; Singh, A. K. CAACs as Efficient Ancillary Ligands for the Synthesis of Robust Catalysts. J. Organomet. Chem. 2021, 956, 122133.
  • Yadav, D.; Singh, R. K.; Singh, S.; Shirage, P. M.; Singh, A. K. Cationic Ruthenium(II)-NHC Pincer Complexes with Hemilabile COD: Solid-state Structural Characterisation and Theoretical Study of an η2-(E,Z)-COD Ligand. J. Organomet. Chem. 2021, 953, 122061.
  • Yadav, D.; Misra, S.; Kumar, D.; Singh, S.; Singh, A. K. Cationic Ruthenium(II)-NHC Pincer Complexes: Synthesis, Characterisation and Catalytic Activity for Transfer Hydrogenation of Ketones. Appl. Organomet. Chem. 2021, 35, e6287. (Author share link)
  • Lichchhavi; Lee, H.; Ohshita, Y.; Singh, A. K.; Shirage, P. M. Transformation of Battery to High Performance Pseudocapacitor by the Hybridization of W18O49 with RuO2 Nanostructures. Langmuir 2021, 37, 1141–1151.
  • Abdel-Magied, A. F.; Theibich, Y.; Singh, A. K.; Rahaman, A.; Doverbratt, I.; Raha, A. K.; Haukka, M.; Richmond, M. G.; Nordlander, E. Asymmetric hydrogenation of an α-unsaturated carboxylic acid catalyzed by intact chiral transition metal carbonyl clusters–diastereomeric control of enantioselectivity. Dalton Trans. 2020, 49, 4244-4256.
  • Ji, R. S.; Tauqeer, M.; Singh, A. K.; Pathak, B.; Mobin, S. M.; Mathur, P. Unusual Demetalation of Iron from [2]Ferrocenophane Skeleton of Di-nuclear Ferracycle Carbonyl Complex. Appl. Organomet. Chem. 2020, 34, e5431.
  • Chatterjee, S.; Guha, N.; Krishnan, S.; Singh, A. K.; Mathur, P.; Rai, D. K. Selective and Recyclable Congo Red Dye Adsorption by Spherical Fe3O4 Nanoparticles Functionalized with 1,2,4,5-Benzenetetracarboxylic Acid. Sci. Rep. 2020, 10, 111.
  • Aldrich, K. E.; Fales, B. S.; Singh, A. K.; Staples, R. J.; Levine, B. G.; McCracken, J.; Smith, M. R.; Odom, A. L. Electronic and Structural Comparisons between Iron(II/III) and Ruthenium(II/III) Imide Analogs. Inorg. Chem. 2019, 58(17), 11699-11715.
  • Singh, S.; Raghuvanshi, A.; Mathur, P.; Singh, A. K. Coordination Behaviour of 2-(Methylthio)Pyrazine with Ag(I) in the Presence of Different Counter Anions and Emission Properties. Polyhedron 2019, 169, 8-13.
  • Tauqeer, M.; Ji, R. S.; Singh, A. K.; Mobin, S. M.; Lahiri, G. K.; Mathur, P. Synthetic and Structural Study on Orthometallated Ferrocene Complexes: Non-Planar Metallabenzene and Five-Membered Metallacycle Complexes with Closed Os3 Triangles. Eur. J. Inorg. Chem. 2018, 2018 (26), 3126–3130.
  • Raghuvanshi, A.; Singh, A. K.; Mobin, S. M.; Mathur, P. Fe(CO)5 Catalyzed [2+2+1] Cycloaddition of Alkyne, Carbodiimide and CO for the Synthesis of 5-Iminopyrrolones. ChemistrySelect 2017, 2 (29), 9245–9248.
  • Beaumier, E. P.; Billow, B. S.; Singh, A. K.; Biros, S. M.; Odom, A. L. A Complex with Nitrogen Single, Double, and Triple Bonds to the Same Chromium Atom: Synthesis, Structure, and Reactivity. Chem. Sci. 2016, 7 (4), 2532–2536.
  • Abdel-Magied, A. F.; Patil, M. S.; Singh, A. K.; Haukka, M.; Monari, M.; Nordlander, E. Synthesis, Characterization and Catalytic Activity Studies of Rhenium Carbonyl Complexes Containing Chiral Diphosphines of the Josiphos and Walphos Families. J. Clust. Sci. 2015, 26 (4), 1231–1252.
  • Bemowski, R. D.; Singh, A. K.; Bajorek, B. J.; DePorre, Y.; Odom, A. L. Effective Donor Abilities of E-t-Bu and EPh (E = O, S, Se, Te) to a High Valent Transition Metal. Dalton Trans. 2014, 43 (32), 12299-12305.
  • Das, B.; Daver, H.; Singh, A.; Singh, R.; Haukka, M.; Demeshko, S.; Meyer, F.; Lisensky, G.; Jarenmark, M.; Himo, F.; et al. A Heterobimetallic FeIIIMnII Complex of an Unsymmetrical Dinucleating Ligand: A Structural and Functional Model Complex for the Active Site of Purple Acid Phosphatase of Sweet Potato. Eur. J. Inorg. Chem. 2014, 2014 (13), 2204–2212.
  • Abdel-Magied, A. F.; Singh, A. K.; Haukka, M.; Richmond, M. G.; Nordlander, E. Diastereomeric Control of Enantioselectivity: Evidence for Metal Cluster Catalysis. Chem. Commun. 2014, 50 (57), 7705–7708.
  • Singh, A. K.; Levine, B. G.; Staples, R. J.; Odom, A. L. A 4-Coordinate Ru(II) Imido: Unusual Geometry, Synthesis, and Reactivity. Chem. Commun. 2013, 49 (92), 10799-10801.
  • Abdel-Magied, A. F.; Singh, A. K.; Haukka, M.; Nordlander, E. [μ-Bis(Diphenylphosphanyl-κ-P)Methane]-Decacarbonyltri-μ-Hydrido-Trirhenium(I)(3 Re—Re) Dichloromethane Solvate. Acta Crystallogr., Sect. E: Crystallogr. Commun. 2011, 67 (12), m1816–m1816.
  • Mathur, P.; Joshi, R. K.; Jha, B.; Singh, A. K.; Mobin, S. M. Towards the Catalytic Formation of α,β-Vinylesters and Alkoxy Substituted γ-Lactones. J. Organomet. Chem. 2010, 695 (24), 2687–2694.
  • Mathur, P.; Shyam Ji, R.; Boodida, S.; Singh, A. K.; Mobin, S. M. Photochemical Reactions of 1-Ferrocenyl-4-Phenyl-1,3-Butadiyne with Fe(CO5 and CO. J. Organomet. Chem. 2010, 695 (17), 1986–1992.
  • Mathur, P.; Singh, A. K.; Chatterjee, S.; Singh, V. K.; Mobin, S. M. Metal Carbonyl-Promoted Reactions of Ferrocenylacetylene with Sulfur to Form Thiophene, Dithiine, Thioketone and Vinylthioketone Derivatives. J. Organomet. Chem. 2010, 695 (7), 950–954.
  • Mathur, P.; Singh, A. K.; Mohanty, J. R.; Chatterjee, S.; Mobin, S. M. Formation of N-Methylated Cyclic Ligand Systems from Unusual Reactions between Trimethylamine N-Oxide and Acetylenes on Fe3Te2(CO)9 and Contrast with Reactions on Fe3E2(CO)9 (E = S, Se). Organometallics 2008, 27 (19), 5094–5098.
  • Mathur, P.; Singh, V. K.; Singh, A. K.; Mobin, S. M.; Thöne, C. Photochemical Reactions of Fe(CO5 with FcCCH in the Presence of S-Powder and CS2: Synthesis and Characterization of [{μ-SC(H)C(Fc)S}(CO)6Fe2], [μ-SC(O)C(H)C(Fc)S}(CO)6Fe2]; Cis-[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(H)C(Fc)}(CO)6Fe2] and Trans -[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(Fc)C(H)}(CO)6Fe2]. J. Organomet. Chem. 2006, 691 (15), 3336–3342.
  • Mathur, P.; Singh, A. K.; Singh, V. K.; Singh, P.; Rahul; Mobin, S. M.; Thöne, C. Coupling Reactions of Ferrocenylacetylene with Mononuclear Metal Carbonyls Fe(CO)5 and M(CO)6 (M = Mo, W): Synthesis and Characterization of [Fe(CO)2 {η5 -2,5-Fc2C5H2CO}C(Fc)CH], [Fe(CO)2{η2:η2-2,5-Fc2C4H2Fe(CO)3}-μ-CO], [Fe(CO)3{η2:η2-2,5-Fc2C4H2CO}], 1,2,4-Triferrocenylbenzene, 2,5-Diferrocenylthiophene, and 2,5-Diferrocenylselenophene. Organometallics 2005, 24 (20), 4793–4798.

Books/Book Chapters

  1. Singh, R. K.; Misra, S.; Singh, A. K. Tripodal Ligands as Powerful Platforms for Designing New Catalysts. In A Closer Look at Coordination Complexes; Kaur, S., Ed.; Nova Science Publishers, Inc.: Hauppauge, 2021; ISBN: 978-1-68507-199-8, DOI: 10.52305/ENZL4915 (in press).