Synthesis, structure and spectroscopy of mono- and di-nuclear copper(I) complexes incorporating anionic thiophene based thiosemicarbazones-first examples
| Autor: | Manvi Sharma, Shikha Indoria, Alfonso Castiñeiras, Jyoti Nandi, Amanpreet Kaur Jassal, Tarlok S. Lobana, Maninder Singh Hundal |
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| Rok vydání: | 2014 |
| Předmět: |
Valency
chemistry.chemical_element Copper Medicinal chemistry Inorganic Chemistry chemistry.chemical_compound Crystallography symbols.namesake Deprotonation chemistry Materials Chemistry Thiophene symbols Van der Waals radius Methanol Physical and Theoretical Chemistry Triphenylphosphine Spectroscopy |
| Zdroj: | Polyhedron. 80:34-40 |
| ISSN: | 0277-5387 |
| DOI: | 10.1016/j.poly.2014.01.002 |
| Popis: | This paper reports six copper(I) complexes with a series of thiophene based N1-substituted thiosemicarbazones, {(C4H3S)R1C2 N3–N2(H)–C1( S)N1HR2} (R1 = H, R2 = Me, Et, Ph, abbrev. HttscN–R2; R1 = CH3; R2 = Et, Ph, abbrev. HattscN–R2) by reacting these thio-liands with [Cu(OAc)(PPh3)2. Here the acetate deprotonated –N2–H hydrogen and the anionic thio-ligands have yielded mono- and di-nuclear complexes (1–6). For R1 = H at C2 carbon, the N3, S-chelated complexes, [Cu(κ1N3, κ1S–ttscN–R2)(PPh3)2] (R2 = Me 1; Et, 2; Ph 3) were formed in methanol. For R1 = Me, the N3, S-chelated-cum-sulfur bridged (κ1N3, κ2S) dinuclear complexes, namely, [Cu2(κ1N3,κ2S–attscN–R2)2(PPh3)2] (R2 = Et 5, Ph 6) were obtained in CH2Cl2–CH3OH. In one case for R1 = H and with R2 = Me, a dinuclear complex, [Cu2(κ1N3,κ2S–ttscN–Me)2(PPh3)2] 4 similar to 5/6 has been isolated in CH2Cl2–CH3OH. The Cu2S2 cores of dimers form parallelograms with the Cu⋯Cu distances in the range, 2.668–2.774 A which are less than twice the sum of van der Waals radius of Cu, 2.80 A. Complexes 1–6 represent first examples in the domain of thiophene based anionic thiosemicarbazones in which the thio-ligands satisfy the primary valency and bind in N,S-chelation mode (1–3) or N,S-chelation-cum-S-bridging mode (4–6). |
| Databáze: | OpenAIRE |
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