The title tetra-nuclear Sn(IV) compound, [Sn(4)(C(7)H(6)Cl)(8)Cl(2)O(2)(OH)(2)], has site symmetry . Two O(2-) and two OH(-) anions bridge four Sn(IV) cations to form the tetra-nuclear compound. The two independent Sn(IV) cations assume SnO(3)C(2) and SnO(2)C(2)Cl distorted trigonal-bipyramidal coordination geometries. Intra-molecular O-H⋯Cl hydrogen bonding is present in the structure. One Cl ...

Manganese(II) complexes [Mn(L)X2] were prepared and characterized, where L is a neutral di-Schiff base ligand incorporating pyridylimine donor arms, including (1R,2R)-N,N0-bis(2-pyridylmethylidene)-1,2diphenylethylenediimine (L), (1R,2R)-N,N0-bis(6-methyl-2-pyridylmethylidene)-1,2-cyclohexyldiimine (L), or (1R,2R)-, (1S,2S)or racemic N,N0-bis(2-pyridylmethylidene)-1,2-cyclohexyldiimine (L), and...

The Ni(II) ion in the one-dimensional title complex, {[Ni(2)(C(4)H(2)O(4))(OH)(2)(C(10)H(9)N(3))(2)]·2H(2)O}(n), has a distorted square-pyramidal coordination environment formed by three O atoms from two bridging hydroxide groups and one carboxyl-ate group of the fumarate ligand and two pyridine N atoms from a di-2-pyridylamine (dpa) ligand. Two hydroxide groups link adjacent metal centers, for...

The centrosymmetric title complex, [Cu(2)Br(4)(C(11)H(10)N(2)O(2))(2)]·2H(2)O, was one of three complexes isolated by slow evaporation of an acetonitrile reaction mixture of CuBr(2) with di-2-pyridyl ketone (1:1 molar ratio). The title complex contains a 1:1 metal-to-ligand ratio of copper(II) with the hydrated form of the ligand di-2-pyridylmethane-diol. The copper centers are bridged by bromi...

Plants of the genus Taraxacum Wigg., have long been used as medicinal herbs. A phytochemical investigation of the aerial parts of Taraxacum bessarabicum (Hornem.) Hand.-Mazz. subsp. bessarabicum (Hornem.) Hand.-Mazz. (Asteraceae) yielded two coumarins [esculetin (1), cichoriin (2)], three flavonoids [ luteolin (3), luteolin 7-O-β-D-glucoside (4), gossypetin (5)] and six phenolic acids and their...

Roberto Chignola, Alessio Del Fabbro, Marcello Farina, Edoardo Milotti Dipartimento di Biotecnologie, Università di Verona, Strada le Grazie 15 CV1, I-37134, Verona, Italia Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Via Valerio 2, I-34127, Trieste, Italia Dipartimento di Elettronica e Informazione, Politecnico di Milano, Via Ponzio 34/5, I20133, Milano, Italia Dipartimento di Fi...

Giulia Cencetti,1, 2 Franco Bagnoli,3, 2 Giorgio Battistelli,1 Luigi Chisci,1 and Duccio Fanelli3, 2 1Dipartimento di Ingegneria dell’Informazione, Università di Firenze, Via S. Marta 3, 50139 Florence, Italy 2INFN Sezione di Firenze, via G. Sansone 1, 50019 Sesto Fiorentino, Italia 3Università degli Studi di Firenze, Dipartimento di Fisica e Astronomia and CSDC, via G. Sansone 1, 50019 Sesto F...

In their study of a quartic integral, Boros and Moll discovered a special class of sequences, which is called the Boros–Moll sequences. In this paper, we consider the concavity and convexity of the Boros–Moll sequences {di(m)}i=0. We show that for any integer m > 6, there exist two positive integers t0(m) and t1(m) such that di(m)+di+2(m) > 2di+1(m) for i ∈ [0, t0(m)] ⋃ [t1(m),m−2] and di(m)+di...