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Transformation of 1,3-imidazolidine-2-thione (SC3H6N2) into (SC3H4N2–O–N2C3H4S)2− dianion chelated in [Pd{κ 3–S, O, S–(SC3H4N2–O–N2C3H4S)}(PPh3)]⋅CH3CN

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Abstract

Reaction of [PdCl2(PPh3)2] with imidazolidine-2-thione {SC3H4(NH)2}in the presence of triethylamine involved activation of N–H bonds and formed an unusual oxo-bridged dianion, (SC3H4N2–O–N2C3H4S) 2− coordinated to Pd II in Pd{κ 3–S, O, S–(SC3H4N2–O–N2C3H4S)}(PPh3)] ⋅CH3CN 1, which has been studied using elemental analysis, IR, NMR, X-ray crystallography and ESI-mass studies.

The activation of N-H bonds of imidazolidine-2-thione (SC3H6N2) on reaction with [PdCl2(PPh3)2] in the presence of triethyl amine base has led to unexpected transformation into the oxo-bridged dianion (SC3H4N2-O-N2C3H4S)2- coordinated complex: [Pd{η 3-S,O,S-(SC3H4N2-O-N2C3H4S)}(PPh3)]·CH3CN.

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Acknowledgements

One of us (AKB) thanks the – Indian Academy of Sciences (Bangalore), National Academy of Sciences (Allahabad) and Indian National Science Academy (New Delhi) for a Summer Fellowship. Financial assistance from the Council of Scientific and Industrial Research (CSIR), New Delhi, in the form of Emeritus Scientist Grant [21(0904)/12-EMR-II] to T.S. Lobana, is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Chemistry, Guru Nanak Dev University, Amritsar, Punjab, 143 005, India

    VINNY MEHRA, AMREEN KAUR BAINS, GEETA HUNDAL & TARLOK S LOBANA

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  1. VINNY MEHRA
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  2. AMREEN KAUR BAINS
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  3. GEETA HUNDAL
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  4. TARLOK S LOBANA
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Correspondence to TARLOK S LOBANA.

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Supplementary Information (SI)

Crystallographic data (excluding structure factors) for the structure in this paper have been deposited with the Cambridge Crystallographic Data Centre, CCDC, 12 Union Road, Cambridge CB21EZ, UK. Copies of the data can be obtained free of charge on quoting the depository numbers CCDC number: 784651 or 1 (Fax: + 44-1223-336-033; E-Mail: deposit@ccdc.cam.ac.uk, http://www.cam.ac.uk).

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MEHRA, V., BAINS, A.K., HUNDAL, G. et al. Transformation of 1,3-imidazolidine-2-thione (SC3H6N2) into (SC3H4N2–O–N2C3H4S)2− dianion chelated in [Pd{κ 3–S, O, S–(SC3H4N2–O–N2C3H4S)}(PPh3)]⋅CH3CN. J Chem Sci 129, 359–363 (2017). https://doi.org/10.1007/s12039-017-1242-1

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  • DOI: https://doi.org/10.1007/s12039-017-1242-1

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