A series of homometallic dinuclear lanthanide complexes containing nonequivalent metal centers [Ln(2)(LH(2))(LH)(CH(3)OH)(N(3))]·xMeOH·yH(2)O [1, Ln = Dy(III), x 0, y 2; 2, Tb(III), 1, 1] have been synthesized [LH(4) 6-((bis(2-hydroxyethyl)amino)-N’-(2-hydroxybenzylidene)picolinohydrazide] and characterized. The assembly contains two different types nine-coordinated centers, because the binding...

A monomeric Mn(II) complex has been prepared with the facially-coordinating Tp(Ph2) ligand, (Tp(Ph2) = hydrotris(3,5-diphenylpyrazol-1-yl)borate). The X-ray crystal structure shows three coordinating solvent molecules resulting in a six-coordinate complex with Mn-ligand bond lengths that are consistent with a high-spin Mn(II) ion. Treatment of this Mn(II) complex with excess KO2 at room tempera...

We continue our study of effective field theory via homotopy transfer L ? $L_\infty$ -algebras, and apply it to tree-level non-Wilsonian actions the kind discussed by Sen in which modes integrated out are comparable mass that kept. focus on construction for string states at fixed levels particular weakly constrained double theory. With these examples mind, we discuss closed toroidal backgrounds...

a series of new heteroleptic chelated copper(ii) complexes that encompass n,n-dibezyl substituted derivative of ethylenediamine (x-diamine) and acetylacetonate (acac) were prepared.  the ir and electronic absorption spectra and the molar conductivity of the complexes are presented and discussed.  the molar conductivity values of the complexes in different solvents reveals a predominance of elec...

This chapter discusses recent progress in the investigation and use of (13)C, (15)N, and (19)F nuclear magnetic resonance (NMR) chemical shifts and chemical shift tensors in proteins and model systems primarily using quantum chemical (ab initio Hartree-Fock and density functional theory) techniques. Correlations between spectra and structure are made and the techniques applied to other spectros...

Electronic structure theory predicts that, depending on the strength of the ligand field, either the quintet ((5)T2) or triplet ((3)T1) term states can be stabilized as the lowest-energy ligand-field excited state of low-spin octahedral d(6) transition-metal complexes. The (3)T1 state is anticipated for second- and third-row metal complexes and has been established for certain first-row compoun...