A DDQ-mediated domino reaction (up to six steps in a single process) has been developed to selectively provide substituted dihydrofurans from a common starting material containing a cyclic bis-thioenol ether. Study of the reaction mechanism highlighted a role played by the sulfur-containing moiety in influencing reaction rate and stereoselectivity.

Six dinuclear ferrous complexes including [Fe2(acpypentO)(O2CMe)(NCS)2] (1), [Fe2(acpypentO)(O2CMe)(NCSe)2] (2), [Fe2(acpypentO)(NCO)3] (3), ([Fe2(acpybutO)(O2CMe)(NCS)2] (5), [Fe2(acpybutO)(O2CMe)(NCO)2] (6), and [Fe2(acpybutO)(O2CMe)(N3)2] (7), one tetranuclear (bis-dinuclear) ferrous compound, [Fe4(acpypentO)2(N3)6] (4), and one mononuclear ferrous compound, [Fe(acpybutOH)(NCS)2] (8), have b...

The organotin(IV) compounds, [Ph3SnL H]n Æ nCCl4 (1), [Me2SnL (OH2)] (2), [ Bu2SnL ] (3), [Ph2SnL ]n (4), [Ph3SnL H]n (5) and [Ph3SnL H]n (7) (L 1 = 2-{[(2Z)-(3-hydroxy-1-methyl-2-butenylidene)]amino}phenylpropionate and L 3 = 2-{[(E)-1-(2-hydroxyaryl)alkylidene]amino}phenylpropionate), were synthesized by treating the appropriate organotin(IV) chloride(s) with the potassium salt of the ligand ...

We present the rare existence of d5 off-centering, weak ferroelectric polarization and demonstrate its correlation with observed magnetoelectric (ME) properties in G type (TN~210 K) antiferromagnet Fe2TeO6 (FTO) compound. The origin ferroelectricity (FE) is associated both lattice asymmetric electron density distribution around ion cores. ME coupling magnetic field-dependent polarization, volta...

Chepoi showed that every breadth /rst search of a bridged graph produces a cop-win ordering of the graph. We note here that Chepoi’s proof gives a simple proof of the theorem that G is bridged if and only if G is cop-win and has no induced cycle of length four or /ve, and that this characterization together with Chepoi’s proof reduces the time complexity of bridged graph recognition. Speci/call...