A Spontaneous Magnetic Moment in an Organic Radical: Synthesis and Characterization of Benzodioxepinyl-1,3,2-dithiazolyl.

The synthesis of the 1,3,2-dithiazolyl radical () derived from 3,4-dihydro-2H-1,5-benzodioxepine is described. Crystals of were grown by vacuum sublimation and adopt the orthorhombic space group . DC SQUID magnetometry reveals Curie-Weiss behavior for > 20 K ( = 0.

A Rare Low-Spin Co Bis(β-silyldiamide) with High Thermal Stability: Steric Enforcement of a Doublet Configuration.

Attempted preparation of a chelated Co β-silylamide resulted in the unprecedented disproportionation to Co and a spirocyclic cobalt(IV) bis(β-silyldiamide): [Co[(N Bu) SiMe ] ] (1). Compound 1 exhibited a room-temperature magnetic moment of 1.8 B.

Neuro- and hepatic toxicological profile of (S)-2,4-diaminobutanoic acid in embryonic, adolescent and adult zebrafish.

(S)-2,4-Diaminobutanoic acid (DABA) is a noncanonical amino acid often co-produced by cyanobacteria along with β-N-methylamino-l-alanine (BMAA) in algal blooms. Although BMAA is a well-established neurotoxin, the toxicity of DABA remains unclear. As part of our development of biocompatible materials, we wish to make use of DABA as both a building block and as the end-product of enzymatically induced depolymerization; however, if it is toxic at very low concentrations, this would not be possible.

Exploring through-bond and through-space magnetic communication in 1,3,2-dithiazolyl radical complexes.

Reaction of the methyl-benzodithiazolyl radical (MBDTA) with M(hfac)2 complexes (M = Mn, Co, Zn) affords the complexes M(hfac)2(MBDTA)2. Strong antiferromagnetic exchange interactions are observed between M(ii) ions and the two S = 1/2 radicals (M = Mn, Co), whereas weak antiferromagnetic interactions are observed between radicals when using the diamagnetic Zn(ii) ion. Strong intermolecular exchange coupling is also evident in Mn(hfac)2(MBDTA)2 and attributed to π*-π* contacts between MBDTA radicals which are absent for the Co and Zn derivatives.