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Synthesis, Structural Characterization and Hirshfeld Analysis of Ag(I), Au(I), Cd(II) and Hg(II) Complexes Containing Hemilabile- Ferrocenylbisphosphine [Fe{C5H4P(C6H4CH2NMe2-o)2}2]

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Abstract

The reaction between bis(phosphino)ferrocene, [Fe{C5H4P(C6H4CH2NMe2-o)2}2] (1) and AgOTf resulted in disilver complex [(AgOTf)2{µ-Fe{C5H4P(C6H4CH2NMe2)2}2}] (2) which on further treatment with 2,2′-bipyrdine yielded a mixed-ligand complex [Ag2(bipy)2{µ-Fe{C5H4P(C6H4CH2NMe2)2}2}](OTf)2 (3). Reaction of 1 with AuCl(SMe2) in 1:2 molar ratio afforded a digold complex [(AuCl)2Fe{C5H4P(C6H4CH2NMe2)2}2] (4). Treatment of 4 with anhydrous CdCl2 resulted in heterometallic complex [Fe{C5H4P(AuCl)(C6H4CH2NMe2)2(CdCl2)}2] (5). The reactions of 1 with anhydrous CdI2 and HgI2 in 1:2 molar ratios yielded bimetallic complexes [Fe{C5H4P(CdI2)(C6H4CH2NMe2)2}2] (6) and [Fe{C5H4P(HgI2)(C6H4CH2NMe2)2}2] (7), respectively. The molecular structures of 3, 4 and 7 were confirmed by single crystal X-ray analysis. Complexes 3 and 7 crystallized in the triclinic space group with P-1, whereas 4 crystallized in the monoclinic space group with C2/c. Single crystals suitable for X-ray crystallography were obtained using diffusion method where a solution of [Fe{C5H4P(C6H4CH2NMe2)2}2] (1) in dichloromethane was layered on a solution of CdI2 and HgI2 in methanol and stored at room temperature for 24 h, resulted in yellow plates of 6 and 7, respectively. All complexes crystallized with the asymmetric unit containing half a molecule and with the Fe atom on an inversion centre. A Hirshfeld surface analysis indicated that the most significant contributions to the crystal packing of 3 are from H‧‧‧H (50.2%), C‧‧‧H/H‧‧‧C (8.3%), Cl‧‧‧H/H‧‧‧Cl (12.1%), O‧‧‧H/H‧‧‧O (11.3%), F‧‧‧H/H‧‧‧F (9.0%) contacts, while those for 4 are from H‧‧‧H (73.7%), C‧‧‧H/H‧‧‧C (8.9%), Cl‧‧‧H/H‧‧‧Cl (14.5%), Au‧‧‧H/H‧‧‧Au (1.8%) and N‧‧‧H/H‧‧‧N (0.8%) contacts, and those for 7 are from H‧‧‧H (65.5%), C‧‧‧H/H‧‧‧C (6.6%), I‧‧‧H/H‧‧‧I (24.1%) and I‧‧‧C/C‧‧‧I (2.9%) contacts.

Graphical Abstract

Crystal structures of silver(I), gold(I) and mercury(II) complexes containing [Fe{C5H4P(C6H4CH2NMe2)2}2] (1) are described.

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Data Availability

Data set generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

MSB thanks the Science & Engineering Research Board, New Delhi, for financial support of this work through grant CRG/2019/000040. We also thank the Department of Chemistry Instrumentation Facilities, IIT Bombay, for spectral and analytical data. DM thanks the Department of Science and Technology, New Delhi, for an Inspire fellowship. JTM thanks the Louisiana Board of Regents for the purchase of the CCD diffractometer and the Chemistry Department of Tulane University for support of the X-ray laboratory.

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DM, SR: Conceptualization, interpretation of the data, visualization, methodology and writing-original draft of the manuscript. JTM: Mounting the crystals, collecting data and solving the structures. MSB: Investigation, supervision, revision of the manuscript and approval of the final version of the manuscript.

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Correspondence to Joel T. Mague or Maravanji S. Balakrishna.

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This paper describes the synthesis and crystal structural analysis of AuI, CdII and HgII complexes of hemilabile- ferrocenylbisphosphine [Fe{C5H4P(C6H4CH2NMe2-o)2}2]

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Mondal, D., Rao, S., Mague, J.T. et al. Synthesis, Structural Characterization and Hirshfeld Analysis of Ag(I), Au(I), Cd(II) and Hg(II) Complexes Containing Hemilabile- Ferrocenylbisphosphine [Fe{C5H4P(C6H4CH2NMe2-o)2}2]. J Chem Crystallogr 53, 273–292 (2023). https://doi.org/10.1007/s10870-022-00966-w

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