V. V. Krisyuk

Structure and properties of terbium(III) dipivaloylmethanate and its adducts with Bipy and Phen

The complex of terbium(III) with dipivaloylmethane (2,2,6,6-tetramethylheptane-3,5-dione = Htmhd) [Tb(tmhd)3]2 (1) and two its adducts with bipyridyl (Bipy) and phenanthroline (Tb(tmhd)3·Bipy (2) and Tb(tmhd)3·Phen (3)) are synthesized and analyzed by single crystal X-ray diffraction. The crystals of [Tb(tmhd)3]2 (1) belong to the monoclinic crystal system: P21/n space group, a = 12.2238(2) Å, b = 27.6369(5) Å, c = 21.8740(4) Å, β = 105.146(1)°, V = 7133.0(2)Å3, Z = 4; the crystals of Tb(tmhd)3·Bipy (2) and Tb(tmhd)3·Phen (3) belong to the triclinic crystal system with unit cell parameters: (2)

Study of the structure of a new heterometallic complex based on copper(II) ketoiminate [ cis -Cu(ki) 2 ·Pb(hfa) 2 ] 2

P\bar 1

CRYSTAL STRUCTURE OF LEAD(II) DIPIVALOYLMETHANATE

space group, a = 11.0554(6) Å, b = 12.2761(7) Å, c = 17.7096(8) Å, α = 77.457(2)°, β = 85.557(2)°, γ = 69.659(2)°, V = 2199.8(2) Å3, Z = 2; (3)

Crystal Structure and Properties of Two Samarium Β-Diketonates

P\bar 1

New volatile zirconium(IV) complex with methoxy substituted β-diketonate

space group, a = 10.8814(3) Å, b = 12.2852(4) Å, c = 18.3590(6) Å, α = 80.463(1)°, β = 87.587(1)°, γ = 68.640(1)°, V = 2253.6(1) Å3, Z = 2. The structures of the complexes are molecular and involve isolated [Tb2(tmhd)6] (1), Tb(tmhd)3·Bipy (2), and Tb(tmhd)3·Phen (3) molecules. The thermal properties of the obtained terbium complexes are studied by TG-DTA.

Structure of zirconium tetrahydroborate Zr(BH4)4: A molecular dynamics study

The cocrystallization method is used to obtain a new volatile heterometallic complex of the composition [Cu(ki)2·Pb(hfa)2]2, where ki = 2-iminopentan-4-onate and hfa = hexafluoroacetylacetonate. The crystallographic data for C20H18CuF12N2O6Pb: a = 10.6729(5)Å, b = 10.7712(5)Å., c = 13.4779(5)Å.; α = 79.1020(10)°, β = 84.5140(10)°, γ = 66.2470(10)°, P-1 space group, Z = 2, dx = 2.102 g/cm3. The compound has a molecular structure built of individual Cu...Pb...Pb...Cu-type tetramers. The Cu...Pb and Pb...Pb distances in the tetramer are 3.454. and 4.122. respectively; the Cu-Pb-Pb angle is 160.7°.

Volatile zirconium complexes with sterically hindered β-diketonates: Structure and thermal properties

The volatile complex of lead(II) with 2,2,6,6-tetramethylheptane-3,5-dione is investigated by X-ray diffractometry. Crystal data: a = 10.901(2), b = 21489(4), c = 10.203(2) å, space group Pccn (N 56), V = 2503.4(8) å3, M = 573.74, Z = 4, dcalc = 2.522 g/cm3. The crystal structure is of molecular type; the molecule of the complex has a nonplanar structure. The lead atom is coordinated by four oxygen atoms of the two bidentate ligands. Films of the complex on substrates of Si and SiO2 single crystals, melted quartz, and glass were obtained by thermal evaporation in vacuum. X-Ray diffraction analysis of the polycrystals and films of the complex showed that the films are distinctly textured along the b axis.

Structure and thermal properties of heterometallic complexes for chemical vapor deposition of Cu–Pd films

Samarium(III) tris-dipivaloylmethanate [Sm(dpm)3]2 (I) and sodium samarium(III) tetrakishexafluoroacetylacetonate [NaSm(hfa)4]n (II) are obtained. The crystal structures of I at 150(2) K (space group P21/n, a = 12.279(1) Å, b = 27.726(3) Å, с = 21.884(2) Å, β = 105.317(3)°, V = 7186.0(11) Å3, Z = 4) and II at 150(2) K (space group C2/c, a = 21.693(2) Å, b = 12.2068(7) Å, с = 14.402(1) Å, β = 124.731(3)°, V = 3134.2(4) Å3, Z = 4) are determined. The structure of the complex I is similar to that of the previously known dimeric [Ln(dpm)3]2 (Ln = La, Pr, Nd, Eu, Gd, Tb) complexes; and the structure of the complex II is similar to that of the known [NaLn(hfa)4]n (Ln = Y, Eu, Er) complexes. It is shown by thermogravimetry that the volatility of REE tris-dipivaloylmethanates increases from Lu to La, the volatility of REE sodium tetrakis-hexafluoroacetylacetonates increases from La to Lu.

A study of the structure and properties of mixed-ligand Cu(II) complexes with hexafluoroacetylacetone and methyl-, phenyl-ketoimines

A new zirconium(VI) complex with fluorinated methoxy substituted β-diketonate ZrL4 is synthesized where L = 1,1,1-trifluoro-5-methoxy-5-methylhexane-2,4-dionate. The complex sublimates without decomposition at a low pressure (10–2 Torr) at 140 °C. The crystal structure of the complex is molecular and composed of mononuclear ZrL4 molecules. Crystallographic data for C32H40F12O12Zr are: C2/c, a = 12.193(2) Å, b = 21.922(4) Å, c = 15.585(3) Å, β = 101.51(3)°, V = 4082.1(14) Å3, Z = 4, d = 1.523 g/cm3. The coordination environment of the zirconium atom is formed by eight oxygen atoms of four β-diketonate ligands; the coordination polymer is a square antriprism. The Zr–O distances are in the range 2.16-2.19 Å. The thermal properties of the complex are studied by TG–DTA.

Structure and properties of heterocomplex compounds based on lead(II) hexafluoroacetylacetonate and copper(II) β-diketonates

In the work the structural and thermodynamic characteristics of zirconium tetrahydroborate Zr(BH4)4 are considered. The initial compound organized in a cubic lattice was heated from absolute zero to temperatures exceeding the experimental boiling temperature. Temperature dependences of the parameters of the internal structure, energy, and density of molecules in bulk are obtained. It is found that on heating the compound to 300 K its structure is maintained and on further cooling it returns to the initial state. On heating above 400 K the irreversible destruction of the crystal lattice is observed. On further cooling the compound in the solid phase becomes amorphous. It is shown that in the new state the average binding energy is lower than that in the initial one and the cubic lattice has the highest binding energy among the considered Zr(BH4)4 structures.