The title compound, C(8)H(12)Br(2)O(4), lies about a crystallographic center of inversion at the midpoint of the central C-C bond. The latter is also repsonsible for the observation of the meso form. There are no intra-molecular hydrogen bonds, but mol-ecules are connected by inter-molecular C-H⋯O inter-actions, forming a three-dimensional network.

1 Goal of paper This paper takes a specific objective: to identify and analyze the methodological and conceptual conditions that are involved in postulating causal relations among meso-historical entities, structures, and processes. What is the nature of the causal relations among structures and entities that make up the social world? What sorts of mechanisms are available to substantiate causa...

Different enamines were introduced at the meso position of the BODIPY by catalyst free oxidation of tert-amines and in situ cross coupling with 8-chloro BODIPY. The reaction conditions were optimized to achieve better yields. The reaction works well with aliphatic tert-amines bearing an N-(CH-CH-) backbone. The N-alkyl substituents perturb the optical properties of enamine substituted BODIPYs.

the synthesis of some 9,10-disubstituted anthracene derivatives are described. 9,10-bis(2-bromoethyl) anthracene 4,9,10-bis (2-cyanoethyl) anthracene 5 and 9,10-bis (4-hydroxybutyl) anthracene 11 are synthesized for the first time.

We study the possibility that axion Peccei-Quinn symmetry is spontaneously broken after beginning of inflation. This scenario interpolates between preinflationary and postinflationary cosmology with significant phenomenological differences from both. Since not present at early stages inflation large inflationary fluctuations are produced only scales constrained by cosmic microwave background (C...

Outdoor sound prediction is both a societal concern and a scientific issue. This paper deals with numerical simulations of micrometeorological (temperature and wind) fields for environmental acoustics. These simulations are carried out using the reference meso-scale meteorological model at the Meteo-France weather agency (Meso-NH). Meso-NH predictions at very fine scales (up to 3 m), including ...

We evaluate herein the impact of positive charge distribution on the in vitro and in vivo properties of Mn porphyrins as redox modulators possessing the same overall 5+ charge and of minimal stericity demand: Mn(III) meso-tetrakis(trimethylanilinium-4-yl)porphyrin (MnTTriMAP(5+)), Mn(III) meso-tetrakis(N,N'-dimethylpyrazolium-4-yl)porphyrin (MnTDM-4-PzP(5+)), Mn(III) meso-tetrakis(N,N'-dimethyl...