T.-H. Lu

Di-μ-acetato-bis[dicarbonyl(pyrazole)ruthenium(I)] and Di-μ-acetato-bis[dicarbonyl(3,5-dimethylpyrazole)ruthenium(I)]

The crystal structures of the title compounds, [Ru 2 (C 2 H 3 O 2 ) 2 (C 3 H 4 N 2 ) 2 (CO) 4 ], (1), and [Ru 2 (C 2 H 3 O 2 ) 2 (C 5 H 8 N 2 ) 2 (CO) 4 ], (2), have been determined. The octahedral coordination about the Ru I ion is slightly distorted in (1) and more distorted in (2), with the two O atoms and two C atoms in the equatorial positions, and one N atom and another Ru ion in the axial positions. Compound (2) has mirror symmetry.

(Isothiocyanato-κN)(1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane-κ4N)- copper(II) perchlorate

In [Cu(NCS)(C 14 H 32 N 4 )]ClO 4 , the Cu II ion is fivefold coordinated in a distorted trigonal-bipyramidal environment and the tetradentate macrocyclic ligand coordinates in a folded fashion. All four methyl groups of the macrocycle are disposed towards the same side as the isothiocyanato group.

(C-meso-5,5,7,12,12,14-Hexamethyl-1,4,8,11-tetraazacyclotetradecane-N1-acetato-N,N',N'',N''',O)copper(II) Bromide Monohydrate

The crystal structure of the title compound, [Cu(C 18 H 37 N 4 O 2 )]Br.H 2 O, shows the Cu II ion to be five-coordinate in a distorted square-pyramidal environment, with the four N atoms equatorial and the O atom axial. The Cu-O and average Cu-N bond lengths are 2.157 (3) and 2.050 (4) A, respectively.

Chloro(1,4,7,11-tetraazacyclotetradecane-N,N',N,N)zinc(II) perchlorate

In the title compound, [ZnCl(C 10 H 24 N 4 )ClO 4 , the coordination about the Zn II ion is distorted square pyramidal with the four N atoms of the macrocycle in the basal positions and the Cl ion axial. The Zn-Cl and average Zn-N bond lengths are 2.2734 (8) and 2.125 (3) A, respectively.

Diperchlorato[(2RS,5SR,9RS,12RS)-2,5,9,12-tetraazatridecane]copper(II)

The Cu II ion in the title compound, [Cu(C 9 H 24 N 4 )-(ClO 4 ) 2 ], is six-coordinate in a distorted square-bipyramidal environment ; four tetraamine N atoms are equatorial and two O atoms, one from each perchlorate ion, are axial. The quadridentate ligand is in its stable planar conformation with the central six-membered chelate ring in a chair form and both terminal five-membered rings in gauche forms. The four chiral N-atom centres have configurations 2RS, 5SR, 9RS and 12RS.

(4,7-dimethyl-4,7-diazadecanediamide)-diisothiocyanatocopper(II)

The Cu II of the title complex, [Cu(NCS) 2 (C 10 H 22 O 2 N 4 )], is six-coordinated in a tetragonally elongated octahedral geometry with the two amine N atoms of the quadridendate ligand and the two N atoms of the isothiocyanato groups equatorial and the two amide O atoms axial. The two N-methyl groups of the tetradendate ligand are trans to each other with respect to the equatorial plane. The complex has a cis-α conformation. The central five-membered ring is in a stable skew form and both of the terminal six-membered rings are in unstable twist forms

[(2RS,5SR,8SR,12SR,15SR)-2,5,8,12,15-Pentaazahexadecane-κ5N2,5,8,12,15]copper(II) diperchlorate

The Cu II atom in the title complex, [Cu(C 11 H 29 N 5 )](ClO 4 ) 2 , is five-coordinate and is in a distorted trigonal-bipyramidal conformation. The longer Cu(equatorial)-N bond distances compared to the Cu(axial)-N distances indicate the steric influence of the two N-methyl groups. The ligand is in its stable conformation with the three five-membered chelate rings in stable skew forms and the six-membered ring in a stable chair form

Structure of (2,5,8,11,14‐pentaazapentadecane)copper(II) diperchlorate monohydrate

The coordination geometry about the Cu II ion is a distorted trigonal bipyramid. There is variation in the five Cu-N bond distances. The four chiral nitrogen centers are in the (2SR,5RS,11RS,14RS) configuration. The ligand is in its most stable conformation with all four five-membered chelate rings in a stable gauche form

Chloro(1,4,8,12‐tetraazacyclopentadecane‐κ4N)zinc(II) Perchlorate

The ZnII ion in [ZnCl(C11H26N4)]ClO4 has a distorted trigonal-bipyramidal geometry, with the tetradentate macrocyclic ligand and the Cl− ion constituting the coordination sphere. The Zn—Cl and average Zn—N bond lengths are 2.284 (1) and 2.159 (4) A, respectively. The three six-membered and one five-membered chelate rings are in chair, chair, skew and gauche conformations, respectively.

[7-Methyl-3,7,11,17-tetraazabicyclo[11.3.1]heptadeca-1(17),13,15-triene-κ4N](nitrato-κO)copper(II) Nitrate Hydrate

The Cu II ion of the title complex, [Cu(NO 3 )(C 14 H 24 N 4 )]-NO 3 .H 2 O, is five-coordinate and the geometry is distorted square pyramidal, with the four N atoms of the macrocyclic ligand equatorial and an O atom of the nitrato group axial. The tetradentate ligand adopts its most stable conformation, with two six-membered rings in chair forms and two five-membered rings in skew forms. The complex has the 3RS, 11SR configuration for the two chiral N centers.