Isostructurality, Polymorphism and Mechanical Properties of Some Hexahalogenated Benzenes: The Nature of Halogen⋅⋅⋅Halogen Interactions
作者:C. Malla Reddy、Michael T. Kirchner、Ravi C. Gundakaram、K. Anantha Padmanabhan、Gautam R. Desiraju
DOI:10.1002/chem.200500983
日期:2006.3.1
both the monoclinic and triclinic structures, and the reasons for polymorphism are suggested. To summarise, both chemical and geometrical models need to be considered for X...X interactions in hexahalogenatedbenzenes. The X...X interactions in the monoclinic group are nonspecific, whereas in the triclinic group some X...X interactions are anisotropic, chemically specific and crystal-structure directing
Regioselectivity of reductive debromination of substituted pentabromobenzenes with sodium tert-butoxide in DMSO
作者:V. N. Shishkin、I. V. Tarasova、K. P. Butin
DOI:10.1007/s11172-006-0126-1
日期:2005.10
The regioselectivity of reductive debromination of substituted pentabromobenzenes C6Br5X (X = NH2, OMe, Me, H, Cl, F, and NO2) under the action of ButONa in DMSO containing ButOH has been studied. The reaction followed the halophilic mechanism via carbanions.
Polyolefins, such as polyethylene and polypropylene, are rendered flame retardant by incorporating therein a combination of (1) a Diels-Alder adduct of a chlorinated cyclopentadiene and a polyunsaturated cycloaliphatic compound and (2) a ring-brominated aromatic compound.
Flame retardants and flame retardant compositions formed therewith
申请人:——
公开号:US20030030043A1
公开(公告)日:2003-02-13
The flame retardant additive compositions comprise (a) one or more bromocycloaliphatic flame retardants; (b) one or more bromoaromatic flame retardants; and (c) one or more synthetic zeolites. Flame retardant polymer compositions comprising at least one thermoplastic polymer such as HIPS with which has been blended, singly and/or in one or more combinations, a flame retardant amount of at least (a), (b), and (c) have a very desirable balance of properties.