Bis(Thiosemicarbazide)Copper(II) 1,5-Naphthalenedisulfonate Complex [Cu(Тsc)<Subscript>2</Subscript>](1,5-Nds): Synthesis and Crystal and Molecular Structures

The synthesis, analysis, and IR spectroscopic, thermogravimetric, and X-ray diffraction study of [Cu(Тsc)₂](Nds) (I), where Тsc is thiosemicarbazide NH₂NHС(=S)NH₂, and 1,5-Nds^2– is the doubly deprotonated 1,5-naphthalenedisulfoacid anion C₁₀H₆(SO₃) ₂ ^2– , have been performed. Crystal structure units in complex I are [Cu(Тsc)₂]²⁺ centrosymmetric complex cations and (Nds)^2– anions (including those in inversion centers). The copper atom is coordinated to the vertices of a square via the two sulfur and two nitrogen atoms of the two bidentate-chelate (S,N) ligands Тsc. Crystal structure units in complex I are linked together by a branched network of weak nonlinear N–Н···О hydrogen bonds with participation of donors (all the five independent hydrogen atoms of the two NH₂ groups and NH group of the [Cu(Tsc)]²⁺ complex cation) and acceptors (all the three independent oxygen atoms of the sulfato group of the 1,5-Nds^2– anion).     

Malonatobenzhydrazidediaquacobalt(II) hydrate: Synthesis,crystal and molecular structures

The coordination compound [Co(L)(Mal)(H₂O)₂]H₂O (I) (L is benzhydrazide, H₂Mal is malonic acid) has been synthesized and studied by IR spectroscopy, thermogravimetry, and X-ray diffraction. Crystals are triclinic, a = 7.610(4) Å, b = 7.854(2) Å, c = 12.751(2) Å, α = 75.12(3)°, β = 88.01(3)°, γ = 80.26(3)°, Z = 2, space group \(P\bar 1\). The structure is molecular. The Co²⁺ atom has a distorted octahedral coordination. The Co-O and Co-N bond lengths are 2.031-2.129(4) and 2.157(5) Å, respectively. The endocyclic O1Co1N1 bond angles are 77.3(2)° and 90.0(2)° in the five- and six-membered chelate rings, respectively. Molecules of complex I are linked via a great number of hydrogen bonds. The C…C contacts between phenyl rings additionally strengthen the structure.     

Coordination compounds of 3<Emphasis Type="Italic">d</Emphasis>-metal valerates and benzoates with nicotinamide

Complexes of iron(II), cobalt(II), nickel(II), copper(II), and zinc valerates and benzoates with nicotinamide were synthesized. The products were characterized by chemical analysis, IR spectroscopy, diffuse reflection spectroscopy, and thermogravimetry.     

Synthesis and crystal structure of hydrated cation-anion nickel(II) thiosemicarbazide and nickel(II) malonate dihydrate complex

A crystal of Ni(HL)₂[Ni(Malon)₂(H₂O)₂]₂ · 3.51H₂O (I), which is built of [Ni(HL)₂]₂₊ cations (HL is thiosemicarbazide), [Ni(Malon)₂(H₂O)₂]_2? anions (H₂ Malon is malonic acid), and molecules of crystal water, has been synthesized and studied by IR spectroscopy, thermogravimetry, and X-ray diffraction. Structural units of complex I are linked by electrostatic interactions and numerous hydrogen bonds. The unit cell parameters b = 7.233(1) Å, c = 24.426(5) Å, β = 127.98(3)°, space group C2/c, Z = 8. The polyhedron of the nickel atom in [Ni(HL)₂]₂₊ cations is a cis-square that is slightly distorted within ～10°. Ligands HL are bidentately chelately coordinated (via N and S) to the nickel atom with the closure of near planar five-membered chelate rings. The malonate groups in [Ni(Malon)₂(H₂O)₂]^2? anions are bidentately chelately coordinated with the formation of six-membered non-planar chelate rings. The coordination of the central atom is complemented to an octahedron with two H₂O molecules. The bond lengths in cations are 1.924(4) and 1.912(4) Å (Ni-N) and 2.144(1) and 2.150(2) Å (Ni-S), and the bond lengths in anions are 2.003–2.046(3) Å (Ni-O) and 2.113(4) and 2.122(3) Å (Ni-O(w)).     

Complexes of 3<Emphasis Type="Italic">d</Emphasis> Metal Biurates with 4-Phenylthiosemicarbazide

Biurate complexes with 4-phenylthiosemicarbazide, namely, [Mn(HL)₂](Urat)₂, [Co(HL)₃](Urat)₃, and [Ni(HL)₄](Urat)₂ (HL is 4-phenylthiosemicarbazide, Urat is anion of uric acid dissociating at first stage) are synthesized and their physicochemical properties and structures are studied by spectroscopic (IR and diffuse reflection) and DTA methods.__________Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 5, 2005, pp. 358–363.Original Russian Text Copyright © 2005 by Koksharova, Yaroslavskaya, Polishchuk.     

Reaction of 3d-transition metal nicotinates and isonicotinates with thiosemicarbazide

Reaction of iron(II), cobalt(II), nickel(II), and copper(II) nicotinates and isonicotinates with thiosemicarbazide were studied, and the resulting coordination compounds were characterized by elemental analyses, IR spectra, diffuse reflectance spectra, and thermogravimetric data.     

Coordination compounds of 3d metals malonates and glutarates with thiosemicarbazide

Complexes of copper(II), nickel(II), and cobalt(III) malonates and glutarates with thiosemicarbazide have been prepared and studied by means of elemental analysis, IR spectroscopy, diffuse reflection spectroscopy, and thermogravimetry.     

Synthesis and Crystal and Molecular Structures of Nickel(II) and Copper(II) 1,5-Napthalenedisulfonate Complexes with Nicotinamide

Russian Journal of Coordination Chemistry - Coordination compounds of nickel(II) and copper(II) 1,5-naphthalenedisulfonates with nicotinamides, [Ni(L)2(H2O)4](Nds) · 3H2O (I) and...     

Synthesis and Characterization of Coordination Compounds of 3d-Metal Malonates with Phenylacetyl Hydrazide. Crystal Structure of [Cu(L)2][Cu(Mal)2] · 4.5H2O (L Is Phenylacetyl Hydrazide,Mal2– Is Malonic Acid Anion)

Russian Journal of Coordination Chemistry - Three phenylacetyl hydrazide malonate complexes [M(L3)](Mal) of cobalt(II) (I), nickel(II) (II), and zinc(II) (III), as well as complex...