Synthesis and spectroscopic characterization of transition-metal chelates containing a new hexadentate ligand. Crystal and molecular structure of the heptacoordinated compound (perchlorato-O) [N,N,N',N'-tetrakis(pyrazol-1-ylmethyl)-1,2-diaminoethane]manganese(II) perchlorate

1984 ◽  
Vol 23 (22) ◽  
pp. 3588-3592 ◽  
Author(s):  
Frans B. Hulsbergen ◽  
Willem L. Driessen ◽  
Jan Reedijk ◽  
Gerrit C. Verschoor
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Crystal And Molecular Structure ◽  
Spectroscopic Characterization ◽  
Metal Chelates ◽  
Transition Metal Chelates ◽  
Hexadentate Ligand

Interaction between metal ions and zwitterionic species. crystal and molecular structure and spectroscopic characterization of [Cu(mtpa)2(NO3)2l (mtpa[2-(3-METHYL-1,2,3-TRIAZOLO [1,5-a]PYRIDINIO)]ACETATE)

Polyhedron ◽  
1996 ◽  
Vol 15 (20) ◽  
pp. 3481-3486 ◽  
Author(s):  
Julia García-Lozano ◽  
Mercedes Sanaú ◽  
José-Vicente Folgado ◽  
Emilio Escrivà ◽  
Santiago García-Granda ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Metal Ions ◽  
Crystal And Molecular Structure ◽  
Spectroscopic Characterization

Synthesis and characterization of octahedral and trigonal bipyramidal transition metal complexes incorporating chelating gallate ligands: crystal and molecular structure of [Me2Ga(N2C5H7)(OCH2CH2NMe2)]Ni[(N2C5H7)2GaMe2]

1980 ◽  
Vol 58 (11) ◽  
pp. 1091-1100 ◽  
Author(s):  
Kenneth S. Chong ◽  
Steven J. Rettig ◽  
Alan Storr ◽  
James Trotter
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Transition Metal Complexes ◽  
Crystal And Molecular Structure ◽  
Synthesis And Characterization ◽  
Chelating Ligands ◽  
Full Matrix ◽  
Trigonal Bipyramidal ◽  
Distorted Trigonal Bipyramidal

The preparation and physical properties of octahedral and trigonal bipyramidal complexes incorporating the tris-chelating ligands [Me2Ga(N2C5H7)(OCH2CH2NR′2)]− (R′ = H or Me) are described. Crystals of [dimethylbis(3,5-dimethyl-1-pyrazolyl)gallato (N(2),N′(2))][dimethyl (3,5 - dimethyl-1-pyrazolyl) (N,N-dimethylethanolamino(gallato (N(2), O, N(3))]nickel(II) are triclinic, a = 20.8562(11), b = 9.1536(4), c = 8.2798(4) Å, α = 100.204(3), β = 85.513(4), γ = 101.989(3)°, Z = 2, space group [Formula: see text]. The structure was solved by Patterson and Fourier syntheses and was refined by full-matrix least-squares procedures to R = 0.048 and Rw = 0.078 for 5508 reflections with I ≥ 3σ(I). The coordination about the Ni atom is distorted trigonal bipyramidal with the two nitrogen atoms from the Me2Ga(N2C5H7)2 ligand occupying equatorial positions. The tridentate Me2Ga(N2C5H7)(OCH2CH2NMe2) ligand is meridionally coordinated with the oxygen in the equatorial and the two nitrogens in the axial positions. Important bond lengths (corrected for libration) are: Ni—N(eq), 2.005(3) and 2.006(3), Ni—O, 1.993(3), Ni—N(pz—ax), 2.072(3), Ni—N(amino), 2.229(3), Ga—O, 1.913(3), Ga—N, 1.971(3)–1.989(3), and Ga—C, 1.961(10)–1.986(6) Å.

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