Three novel Cd(II) dithiocarbamate complexes: synthesis, structural diversity and fluorescence properties
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ORIGINAL PAPER
Three novel Cd(II) dithiocarbamate complexes: synthesis, structural diversity and fluorescence properties Ravi Pratap Singh1 · Vinay Kumar Maurya1 · Lal Bahadur Prasad1 · Kafeel Ahmad Siddiqui2 Received: 9 August 2019 / Accepted: 29 May 2020 © Iranian Chemical Society 2020
Abstract Three new homoleptic cadmium (II) dithiocarbamate complexes having molecular formula [Cd(KL)2], (KL1 = C15H13N1F1S2) (1); (L2 = C13H11N1F1S2) (2); (L3 = C11H14N1O1S2) (3), have been synthesized and characterized by elemental analysis, spectroscopy (IR, 1H and 13CNMR and UV–Vis). Single crystal X-ray studies confirm that the complex 1 crystallises in Orthorhombic with space group Pna21 and holding dimeric structure. In this complex Cd2+ having distorted octahedral geometry about the metal centre forms 1D coordination polymeric structures. The dimeric form of complex 2 and 3 crystallizes in triclinic crystal lattice with space group P-1. Keywords Cd–dithiocarbamate complexes · C–H…S interactions · Fluorescence properties
Introduction The coordination chemistry of dithiocarbamate ligands is of peculiar interest, as it can form complexes with most of the transition and main group metal ions [1–6]. The intermolecular interactions of dithiocarbamate ligands with metals form homoleptic [M(L)2]2− anions, in monodentate, bidentate (chelate or bridging), tridentate and even tetradentate fashion, yielding exciting coordination properties and unusual bonding behavior which are responsible for structural diversity and properties of complexes. Such abilities bring in several keystone features which can be implemented in various fields like industry, agriculture and in biomedical fields (cancer, neurogenerative diseases). Recently the dithiocarbamate and iron chelators moieties can be considered as Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13738-020-01965-4) contains supplementary material, which is available to authorized users. * Lal Bahadur Prasad [email protected] * Kafeel Ahmad Siddiqui [email protected] 1
Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
Department of Chemistry, National Institute of Technology Raipur, G. E. Road, Raipur, Chhattisgarh 492010, India
2
fruitful way in the treatment of abnormalities of AIDS and neurodegenerative diseases as the dithiocarbamate have the potential to block the activation of nuclear factor KB (NFKB), a transcription factor involved in inflammatory processes and human immunodeficiency virus type 1 (HIV-1) expression and signaling events regarding to type of cancer (Scheme 1). In contrast to a plethora of examples of Zn(II) dithiocarbamates [2,3b] showing structural diversity, the number and structural types of cadmium dithiocarbamate complexes reported to date are extremely limited [7–16]. Here we have reported three new homoleptic Cd-complexes of having formula [Cd(KL)2], (KL1 = C 15H 13N 1F 1S 2) (1); (L2 = C13H11N1F1S2) (2); (L3 = C11H14N1O1S2) (3), based on
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