0000000000009363
AUTHOR
Piu Dhal
Novel mixed-valence Cu compounds formed by Cu(II) dimers with double oximato bridges: in situ formation of anionic layer [Cu2(SCN)3]n(n-).
Two new N3O donor ketoxime Schiff bases (HL(1) and HL(2)) have been synthesized by condensing N,N-dimethylethylenediamine with diacetylmonoxime and benzilmonoxime, respectively in a 1:1 ratio. Reaction of Cu(ClO4)2·6H2O with HL(1) resulted in a discrete oximato-bridged dinuclear Cu(II) complex [Cu2(L(1))2(H2O)2](ClO4)2 (1). The same reaction in presence of NaSCN affords the complex {[Cu(II)2(L(1))2][Cu(I)4(μ(1,3)-SCN)4(μ(1,1,3)-SCN)2]}n (2), where partial Cu(II)→Cu(I) reduction is observed. In 2, arrays of [Cu(II)2(L(1))2](2+) cationic units are inserted in between 2D {[Cu(I)4(SCN)6](2-)}n layers and connected via μ(1,1,3)-SCN(-) links, thus forming a 3D network. On the other hand, reaction…
Ferromagnetic copper(II)–copper(II) interaction in a single chlorido and dicyanamido bridged mixed–valence copper(I/II) 2D polymer generated by in situ partial reduction of copper(II)
A mixed-valence 2-D Cu(I/II) complex, [{Cu(II)(dmen)(μ-Cl)(μ1,5-dca)}{Cu(I)(μ1,5-dca)}]n (1) (dmen = N,N-dimethylethylenediamine, dca = dicyanamide = [N(CN)2]−), has been synthesized by in situ partial reduction of Cu(II) to Cu(I) using benzoin (2-hydroxy-1,2-di(phenyl)ethanone) as reductant. Complex 1 was characterized by spectroscopic techniques, single crystal X-ray diffraction, and low temperature magnetic measurements. Structural investigation reveals that 1 represents a mixed-valence 2-D coordination polymer formed by parallel 1-D [Cu(II)(dmen)(Cl)Cu(I)(μ1,5-dca)2]n chains running along the b axis, where chloride bridges Cu(II) ions of adjacent polymers through long connections (2.840…
Copper-Assisted Hemiacetal Synthesis: A Cu II Chain Obtained by a One-Step in situ Reaction of Picolinaldehyde
International audience; The 1D polymer complex [Cu2(L)2(SCN)2]n (1 ) has been synthesised in a one‐step in situ reaction of picolinaldehyde with sodium thiocyanate. The complex 1 was characterised by FTIR spectroscopy, UV/Vis spectrophotometry and elemental analysis. The crystal structure of complex 1 shows that chains of dimer complexes are formed with tetra‐ and pentacoordinate copper centres alternately linked by one thiocyanato and two alkoxido bridges. Variable‐temperature magnetic measurements showed a strong antiferromagnetic interaction between the copper centres within the dimer mediated by the two alkoxido bridges with a J value of –374 cm–1, which is in agreement with the DFT‐cal…
CCDC 929097: Experimental Crystal Structure Determination
Related Article: Piu Dhal, Madhusudan Nandy, Dipali Sadhukhan, Ennio Zangrando, Guillaume Pilet, Carlos J. G��mez-Garc��a, Samiran Mitra|2013|Dalton Trans.|42|14545|doi:10.1039/C3DT51561C
CCDC 929096: Experimental Crystal Structure Determination
Related Article: Piu Dhal, Madhusudan Nandy, Dipali Sadhukhan, Ennio Zangrando, Guillaume Pilet, Carlos J. Gómez-García, Samiran Mitra|2013|Dalton Trans.|42|14545|doi:10.1039/C3DT51561C
CCDC 929098: Experimental Crystal Structure Determination
Related Article: Piu Dhal, Madhusudan Nandy, Dipali Sadhukhan, Ennio Zangrando, Guillaume Pilet, Carlos J. Gómez-García, Samiran Mitra|2013|Dalton Trans.|42|14545|doi:10.1039/C3DT51561C
CCDC 933880: Experimental Crystal Structure Determination
Related Article: Piu Dhal, Ashok Sasmal, Carlos J. Gómez-García, Antonio Bauzá, Antonio Frontera, Guillaume Pilet, Samiran Mitra|2014|Eur.J.Inorg.Chem.||3271|doi:10.1002/ejic.201402176
CCDC 949195: Experimental Crystal Structure Determination
Related Article: Madhusudan Nandy, Shyamapada Shit, Piu Dhal, Corrado Rizzoli, Carlos J. Gómez–Garcia, Samiran Mitra|2015|J.Coord.Chem.|68|916|doi:10.1080/00958972.2014.1003814