Synthesis and Structural Systematics of First-Row Transition Metal Complexes with 2-[Bis(benzimidazol-2-ylmethyl)amino]ethanol

1987 ◽  
Vol 42 (10) ◽  
pp. 1307-1314 ◽  
Author(s):  
Kazuhiro Takahashi ◽  
Yuzo Nishida
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Structural Parameters ◽  
Biological Systems ◽  
Tridentate Ligand ◽  
Crystal Data ◽  
Space Group ◽  
Distorted Octahedral

Abstract A nickel(II) complex with (bbimae) (= 2-[bis(benzimidazol-2-ylmethyl)amino]ethanol), [Ni(bbimae)(NCS)2] · H2O (1) and an oxovanadium(IV) complex, [VO(bbimae)(NCS)2] · dma (dma = N.N-dimethylacetamide) (2) have been prepared and their crystal structures determined by X-ray diffraction. Crystal data for 1 at 293 K: a = 13.334(2). b = 17.048(2), c = 10.3829(9) Å, space group P212121, Z = 4, and dcalcd = 1.41 gcm-3. Crystal data for 2 at 293 K: a = 14.099(2). b = 14.998(4), c = 14.051(2) Å, β = 107.634(9)°, space group P21/c, Z = 4, and dcalcd = 1.36 gcm-3. In the nickel(II) complex, (bbimae) functions as a tetradentate ligand, and the geometry around Ni(II) ion is best described as distorted octahedral. The structure is very similar to those of the correspond­ing Co(II) and Mn(II) complexes. In the case of 2, which is also distorted octahedral, (bbimae) is a tridentate ligand without the coordination of the alcohol group. The M-N (benzimidazole) distances are in the range of 1.95-2.18 Å, and also observed for other first-row transition metal complexes with (bbimae). and differ in the order V(IV) < Mn(II) > Co(II) > Ni(II) > Cu(II). consistent with effective ionic radii of the metal ions. Comparison of the structural parameters of these complexes with those of the metal ions in biological systems has supported the usefulness of the tripod-like ligands to synthesis model compounds for biological systems.

Synthesis, characterization, and X-ray structural studies of octahedral transition metal complexes incorporating the novel anionic tridentate ligand, dimethyl(ethanolamino)(1-pyrazolyl)- gallate, [Me2Ga(OCH2CH2NH2)(N2C3H3)]−

1978 ◽  
Vol 56 (9) ◽  
pp. 1212-1221 ◽  
Author(s):  
Kenneth S. Chong ◽  
Steven J. Rettig ◽  
Alan Storr ◽  
James Trotter
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Tridentate Ligand ◽  
The Novel ◽  
Structural Studies ◽  
Space Group ◽  
X Ray ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

Details of the synthesis and physical properties of octahedral transition metal complexes of the tridentate tris chelating ligand [Me2Ga(OCH2CH2NH2)(N2C3H3)]− are given. Crystals of sym-fac-bis[dimethyl(ethanolamino)(1-pyrazolyl)gallato(N(2),O,N]nickel(II) are monoclinic, a = 11.7908(6), b = 7.3158(6), c = 12.5797(8), β = 97.035(7)°, Z = 2, space group P21/n and crystals of the mer isomer are monoclinic, a = 18.6617(7), b = 8.7941(4), c = 13.5670(8), β = 91,766(4)°, Z = 4, space group P21/c. The structures were solved by Patterson and Fourier syntheses and were refined by full-matrix least-squares procedures to final R values of 0.048 and 0.052 for 1881 and 2573 reflections with I ≥ 3σ(I) for the fac and mer isomers respectively. The nickel atoms in both structures were found to have distorted octahedral coordination geometry. Bond lengths (corrected for libration) are: Ni—O, 2.090(3); Ni—N, 2.085(3) and 2.112(3); Ga—O, 1.908(3); Ga—N, 2.010(3); and Ga—C, 1.979(5) and 1.981(6) Å for the fac isomer, and Ni—O, 2.045(4) and 2.049(4); Ni—N, 2.091 (4)-2.156(5); Ga—O, 1.898(4) and 1.899(4); Ga—N, two at 1.991 (5); and Ga—C, 1.948(8)-1.971 (7) Å for the mer isomer.

Cyclopentadienyl-ruthenium and -osmium chemistry. XXII. Synthesis, X-ray structure and some reactions of RuCl(PPh3,)(η1-dppm)(η-C5H5),containing a monodentate CH2(PPh2)2 ligand

1983 ◽  
Vol 36 (10) ◽  
pp. 2065 ◽  
Author(s):  
MI Bruce ◽  
MG Humphrey ◽  
JM Patrick ◽  
AH White
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Structural Parameters ◽  
The Other ◽  
Chloro Complex ◽  
Triclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Halogen Exchange

.Stoichiometric amounts of RuCl(PPh3)2(η-C5H5) and dppm react in refluxing C6H6 to give RuCl- (PPh3)(η1-dppm)(η-C5H5) which has been fully characterized by an X-ray study (triclinic, space group P1, a 22.377(6), b 9.913(2), c 9.826(3)Ǻ, α 70.46(2), β 78.72(2), γ 80.40(2)°, Z 2) in which 3299 data [I > 3σ(I)] were refined to R 0.046, R' 0.052. Structural parameters are similar to those of other RuX(PR3)2(η-C5H5) complexes. The chloro complex was converted into [Ru(PPh3)(η2- dppm)(η-C5H5)]+ salts; the other PPh3 ligand can be replaced by a second dppm ligand to give [Ru(dppm)2(q-C5H3)+ which contains both mono- and bidentate dppm ligands. Alkylation of the uncoordinated phosphorus with MeI is accompanied by halogen exchange to give [RuI(PPh3)- (PPh2CH2PMePh2)(η-C5H5)I], while reactions with a variety of transition metal complexes result in abstraction of PPh3 and formation of RuCl(dppm)(η-C5H5).

Crystal and molecular structures of three transition metal complexes incorporating the anionic tridentate chelating ligands [Me2Ga(N2C5H7)OCH2CH2SR]− where R = Et or Ph

1981 ◽  
Vol 59 (15) ◽  
pp. 2391-2401 ◽  
Author(s):  
Steven J. Rettig ◽  
Alan Storr ◽  
James Trotter
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Molecular Structures ◽  
Distorted Octahedral Geometry ◽  
The Novel ◽  
Space Group ◽  
Bond Lengths ◽  
Tetrahedral Environment ◽  
Distorted Octahedral

X-ray crystallographic studies of three transition metal complexes incorporating the novel anionic tridentate chelating ligand [Me2Ga(N2C5H7)OCH2CH2SR]− (R = Et or Ph) show that the ligand is facially coordinated in each case. Crystals of [dimethyl(3,5-dimethyl-1-pyrazolyl) (2-thioethoxyethoxy)gallato(N(2), O,S)]nitrosylnickel(I) are monoclinic, a = 8.8313(4), b = 7.2402(2), c = 26.539(1) Å, β = 94.390(3)°, Z = 4, space group P21/c, R = 0.040 and Rw = 0.050 for 2489 reflections. The Ni atom is in a distorted tetrahedral environment with bond angles about Ni ranging from 87.90(7) to 127.9(1)°. The nitrosyl coordination is slightly non-linear with Ni—N—O = 170.1(4)°. Important bond lengths (corrected for libration) are: Ni—S, 2.326(1), Ni—O, 2.019(2), Ni—N(pyrazolyl), 1.980(3), Ni—N(O), 1.633(3) and N—O, 1.156(4) Å. Crystals of [dimethyl(3,5-dimethyl-1-pyrazolyl) (2-thiophenoxyethoxy)gallato(N(2),O,S)]tricarbonylmanganese(I) are triclinic, a = 9.4911(5), b = 10.4323(6), c = 11.7618(7) Å, α = 86.17(1), β = 69.547(5), γ = 81.402(4)°, Z = 2, space group [Formula: see text]R = 0.029 and Rw = 0.035 for 2496 reflections. The Mn atom is coordinated to the fac-tridentate gallate ligand and to three carbonyl ligands resulting in a slightly distorted octahedral geometry. Important corrected bond lengths are: Mn—S, 2.397(1), Mn—O, 2.055(2), Mn—N, 2.082(3), and Mn—C, 1.794(4), 1.807(4), and 1.807(4) Å. Crystals of [dimethyl(3,5-dimethyl-1-pyrazolyl) (2-thioethoxyethoxy)gallato(N(2),O,S)](η3-cycloheptatrienyl)dicarbonylmolybdenum are monoclinic, a = 17.030(3), b = 19.097(2), c = 15.908(3) Å, β = 115.99(1)°, Z = 8, space group P21/n R =0.036 and Rw = 0.043 for 4477 reflections. The two crystallographically independent molecules differ primarily in the orientation of the S-ethyl moiety and each contains an η3-C7H7 ligand which occupies one coordination site of a distorted octahedron as a %-donating ligand. Important corrected bond distances are: Mo—S, 2.527(2) and 2.541(2), Mo—O, 2.241(5) and 2.237(4), Mo—N, 2.277(5) and 2.254(5), Mo—C(O), 1.940(7)–1.960(7), and Mo—C(C7H7), 2.198(6)−2.391(7) Å.

Synthesis, Characterization and in vitro Biological Evaluation of a New Schiff Base Derived from Drug and its Complexes with Transition Metal Ions

2018 ◽  
Vol 69 (7) ◽  
pp. 1678-1681
Author(s):  
Amina Mumtaz ◽  
Tariq Mahmud ◽  
M. R. J. Elsegood ◽  
G. W. Weaver
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Free Ligand ◽  
Transition Metal Ions ◽  
Biological Evaluation ◽  
Pyridoxal Hydrochloride

New series of copper (II), cobalt (II), zinc (II), nickel (II), manganese (II), iron (II) complexes of a novel Schiff base were prepared by the condensation of sulphadizine and pyridoxal hydrochloride. The ligand and metal complexes were characterized by utilizing different instrumental procedures like microanalysis, thermogravimetric examination and spectroscopy. The integrated ligand and transition metal complexes were screened against various bacteria and fungus. The studies demonstrated the enhanced activity of metal complexes against reported microbes when compared with free ligand.

Transition metal complexes of a tridentate ligand bearing two pendant pyridine bases: The X-ray crystal structure of pentacoordinate copper(II) complex

2005 ◽  
Vol 358 (13) ◽  
pp. 3799-3806 ◽  
Author(s):  
Kalagouda Gudasi ◽  
Ramesh Vadavi ◽  
Rashmi Shenoy ◽  
Manjula Patil ◽  
Siddappa A. Patil ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Tridentate Ligand ◽  
X Ray ◽  
Pyridine Bases

New crystal data of some solid transition-metal complexes

1982 ◽  
Vol 15 (6) ◽  
pp. 632-635
Author(s):  
M. M. Abou Sekkina ◽  
T. M. Salem ◽  
M. F. El-Shazly ◽  
A. El-Dissouky
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Crystal Data

Studies on complexes of VO(II), Mn(II), Cu(II), Ni(II), Co(II), Zn(II), Fe(III), and UO2(II) with hydrazone β-diketone ligands

1990 ◽  
Vol 68 (5) ◽  
pp. 774-781 ◽  
Author(s):  
Mohamed S. Abdel-Moez ◽  
Shaker L. Stefan ◽  
Mostafa M. El-Behairy ◽  
Mohamed M. Mashely ◽  
Basheir A. El-Shetary
Keyword(s):  
Magnetic Susceptibility ◽  
Transition Metal ◽  
Ir Spectra ◽  
Metal Ions ◽  
Metal Complexes ◽  
Stability Constants ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Water Solvent ◽  
Uv Visible

The stepwise stability constants of VO(II), Mn(II), Cu(II), Ni (II), Co(II), Zn(II), Fe(III), and UO2(II) metal ions with 2-(2-acetylphenylhydrazone)-5,5-dimethyl-1,3-cyclohexane dione (2-APHDm), 3-(2-acetylphenylhydrazone)pentane-2,4-dione (2-APHA), 2-(2-acetylphenylhydrazone)-1-phenyl-1,3-butane dione (2-APHB), 2-(2-acetylphenylhydrazone)-1,3-diphenyl-1,3-propane dione (2-APHDB), and 3-(2-acetylphenylhydrazone)-1,1,1-trifluoropentane-2,4-dione (2-APHTA) were determined at 30 °C by pH titrations in 75% (v/v) dioxane–water solvent. In addition, metal complexes of three related β-diketones, 2-APHA, 2-APHB, and 2-APHDB have been synthesized and characterized by elemental analysis, uv–visible, ir spectra, and conductance in DMF and magnetic susceptibility measurements. The structure of the complexes have been proposed. Keywords: transition metal complexes of hydrazone-β-diketone ligands.

Synthesis, characterization, potentiometry, and antimicrobial studies of transition metal complexes of a tridentate ligand

2010 ◽  
Vol 63 (23) ◽  
pp. 4153-4164 ◽  
Author(s):  
Sarika Manohar Jadhav ◽  
Vinod Ambadas Shelke ◽  
Achut Sadashiv Munde ◽  
Sunil Govind Shankarwar ◽  
Vaishali Ramrao Patharkar ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Tridentate Ligand ◽  
Antimicrobial Studies
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