This review discusses the coordination number (CN) and the coordination geometry of the first coordination sphere of Pb(II) atoms in crystal structures of 98 lead(II) complexes with O-donor ligands and the stereochemically active lone pair of electrons (LP, E) in the terms of the valence shell e...

A polyether adduct of the lead(II) hexafluoroacetylacetonate has been synthesized and characterized by elemental analysis, NMR spectroscopy, mass spectrometry and infrared spectroscopy. The single crystal X-ray diffraction study provides evidence of a dimeric structure of the type [Pb(hfa)2 · d...

The lead(II) β-diketonates Pb(acac)2, Pb(hfac)2, Pb(tta)2, Pb(dbm)2 and Pb(dpm)2 with acac = acetylacetonate, hfac = hexafluoroacetylacetonate, tta = thenoyltrifluoroacetonate, dbm = dibenzoylmethanate and dpm = dipivaloylmethanate show an intraligand (IL) phosphorescence in low temperature gla...

Chain complex of copper(II) hexafluoroacetylacetonate with pyrazole-substituted nitronyl nitroxide containing exchange-coupled copper(II)–nitroxide clusters has been studied using electron paramagnetic resonance (EPR) spectroscopy. The structural rearrangements at low temperatures induce spin t...

The crystal structures were determined for four novel and two earlier reported mixed ligand complexes of Ca, Sr and Ba hexafluoroacetylacetonates with two tetradentate polyglymes – triethyleneglycol dimethyl and monomethyl ethers (triglyme and trigmo respectively). The new compounds [M(hfa)2(tr...

The hexafluoroacetylacetonate (hfac) chemistry of lead was investigated to make comparisons with the similarly sized lanthanides that form air stable Ln(hfac)3(diglyme) complexes. [Pb(hfac)2(μ-η3:η1-diglyme)]2 was obtained from PbO, (MeOCH2CH2)2O, and H(hfac) and was found to exist in the sol...

A novel polymeric PbII complex containing three different ligands, [Pb(μ-4,4′-bipy)(μ-OAc)(hfacac)]n (1) (4,4′-bipy = 4,4′-bipyridine, OAc− = acetate and hfacac− = hexafluoroacetylacetonate), has been synthesized and characterized. The single-crystal X-ray data showed that the coordination ...

The compounds Tl(hfac), Pb(hfac)2 and Bi(hfac)3 with hfac=hexafluoroacetylacetonate show a green phosphorescence (λmax≈500 nm) under ambient conditions. This emission which is facilitated by the heavy atom effect of the metals originates from the lowest-energy hfac intraligand triplet.

Thermal co-decomposition of silver(I) acetylacetonate and tin(II) hexafluoroacetylacetonate has been examined by using thermal gravimetry, differential scanning calorimetry and complementary analyses of gaseous products and solid residues by Fourier transform infrared and Raman spectroscopy, X-r...

Structure determinations for 2,2′-bipyridine and 1,10-phenanthroline adducts of lead(II) hexafluoroacetylacetonate, [Pb(bipy)2(hfacac)2] (1), [Pb(bipy)(hfacac)2] (2), and [Pb(phen)(hfacac)2] (3), show that the balance of intermolecular forces within the lattices is seemingly sensitive to the ad...

A new hetero-spin compound 1 derived from 1,4-bis(nitronyl nitroxide) benzene and Mn(II) hexafluoroacetylacetonate [Mn(hfac)2] was prepared and characterized. Its crystal structure was determined: monoclinic, P2(1)/n, a=16.3260(7) Å, b=13.7080(7) Å, c=18.396(1) Å, β=68.380(5)°, V=3827.3(3) Å3,...

A new nitronyl nitroxide NIT2-bithph (1) and its manganese(II) compound [Mn(hfac)2(IMHBithph)]2·(NIT2-bithph)(C6H14) (2) (hfac = hexafluoroacetylacetonate; NIT2-bithph = 4,4,5,5-tetramethyl-2-(bithiophenal-2-yl)imidazoline-1-oxyl-3-oxide; IMHBithph = 1-hydroxy-2-bithiophenal-4,4,5,5-tetramethyl...

We report the structure of a one-dimensional chain compound formed by manganese(II) hexafluoroacetylacetonate (hfac) and nitroxide radical 2-diethylin-4,4,5,5-tetramethyl-4,5-dihydro-1-imidazol-1-oxy-3-oxide (NITPhNEt2), Mn(hfac)2·NITPhNEt2·C2H5OH, which crystallize in the monoclinic C2/c spac...

Treatment of a tetrahydrofuran solution of CrCl2(thf) with Na(hfac), hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate, followed by crystallization from diethyl ether, affords the six-coordinate chromium(II) complex Cr(hfac)2(thf)2. The crystal structures of Cr(hfac)2(thf)2 and the chromium(III) comp...

A new nitronyl nitroxide NIT-Ph-m-OCH2trz (1) and its complexes [M(hfac)2]2(NIT-Ph-m-OCH2trz)2 (M = Mn (2), Co (3); NIT-Ph-m-OCH2trz = 2-(3-((1H-1,2,4-triazol-1-yl)methoxy)phenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide; hfac = hexafluoroacetylacetonate) have been successfully synthesized ...

A series of polynuclear complexes (2–5, 7) and dinuclear complex (6) of first row transition metals have been synthesized by the reaction of β-diketonate metal complexes including Mn(II), Zn(II), Co(II) and Cu(II) with the fluorescent anthracene ligand 9,10–Bis(4-pyridyl)anthracene (bpanth). ...

The potential valence tautomeric (VT) properties of 1:1 adducts of MnII bis-malonates and MnII bis-hexafluoroacetylacetonates with bidentate redox-active ligands – o-benzoquinone, its imine and diimine derivatives (complexes I) and 1,4-diazabuta-1,3-diene (complexes II) were computationally stu...

The magnetic properties of dinuclear manganese(II) complex [Mn(hfa)2cpo]2 (where hfa is hexafluoroacetylacetonate anion and cpo is 4-cyanopyridine-N-oxide) are presented. The non-monotonous dependence of magnetic susceptibility is explained in terms of the hierarchy of exchange parameters by usi...

The reaction of Mn(hfac)2 · 2H2O (hfac, hexafluoroacetylacetonate anion) with 4-cpyNO (4-cyanopyridine-N-oxide) in chloroform results in the formation of a novel mixed-ligand complex [Mn(hfac)2(4-cpyNO)]2. X-ray single crystal structure revealed the presence of dinuclear molecules [Mn(hfac)2(4-...

Two manganese(II) hexafluoroacetylacetonate complexes, dihydrate, the Mn(hfa)2(H2O)2 (1), and the bimetallic KMn(hfa)3 (2) have been synthesized and characterized by X-ray single crystal structure analysis. They have a molecular structure and a polymeric structure, respectively. The high stabili...