Crystal Structure of the Carbon Tetrabromide p-Xylene Complex

Abstract

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Halogen Bonding in the Design of Organic Phosphors

“…The angles C-IÁ Á Áπ are in the range 159-175 . The bonding direction and bonding angle are in agreement with halogenÁ Á Áπ interaction [27,28] and that predicted by σ-hole [15]. Between two different 1,4-DITFB molecules, an edge-toedge π-π stacking analogous to J-aggregation was observed, which stabilized the 1D infinite chain.…”

Charge-transfer character of halogen bonding: Molecular structures and electronic spectroscopy of carbon tetrabromide and bromoform complexes with organic σ- and π-donors

“…Thus, the separation between the bromine atom and the benzene plane is decreased from 3.34Å in the CBr 4 complex with the weak p-xylene donor [17], to 3.21Å in the associate with the stronger durene donor [31] and further to 3.144Å in the complex with OMTP (oxidation potentials for these donors are 2.01, 1.84, and 1.75, respectively, [32]). …”

“…Indeed, the complexes of molecular iodine and bromine acceptors with aromatic donors represent classic examples of charge-transfer compounds [14,15]. In comparison, although intermolecular associates of halocarbons with amines have been known more than a hundred years [16], and complexes of carbon tetrabromide with p-xylene were characterized structurally as early as the 1960s [17], only scattered (interim) reports appeared until the end of the 1990s [18][19][20].…”

The unusual solubility behavior of poly(2,6‐dimethyl‐1,4‐phenylene ether) in methylene chloride

“…Several bonding interactions may be important in the formation of the methylene chloride complex. Halomethanes are known t o associate with both ethers and aromatic hydrocarbons by hydrogen bonding (4) and t o form solid state charge-transfer complexes with aromatic hydrocarbons (5,6). Also, contact charge transfer h a s been suggested t o explain the spectroscopic interaction of halomethanes and aromatic hydrocarbons (7).…”