Water-chloride and water-bromide hydrogen-bonded networks: influence of the nature of the halide ions on the stability of the supramolecular assemblies.
Two compounds, namely, [TTPH(2)](Cl)(2) x 4 H(2)O (1) and [TTPH(2)](Br)(2) x 4 H(2)O (2), (TTP = 4'-p-tolyl-2,2':6',2''-terpyridine) were synthesized from purely aqueous media and characterized by physical techniques. In the solid-state structures of these compounds, interesting supramolecular assemblies are observed. In 1, an unusual staircase-like architecture of the tape of edge-shared planar water hexamer is of importance, where the chloride ions are at the two edges of the tape. In 2, the polymeric nature of the water-bromide assembly is of interest, where discrete open-cube water octamers are doubly bridged by bromide ions. Semiempirical and DFT calculations confirm that the nature of the anion indeed affects the topology of the water-halide assemblies. We conclude that the protonated [TTPH(2)](2+) species can act as appropriate receptors for halide ions, which in turn act as a matrix for the formation of polymeric 1D water-halide assemblies.
Dey
Biswajit
B
Department of Chemistry, Jadavpur University, Kolkata 700 032, India.
Choudhury
Somnath Ray
SR
Gamez
Patrick
P
Vargiu
Attilio Vittorio
AV
Robertazzi
Arturo
A
Chen
Chih-Yuan
CY
Lee
Hon Man
HM
Jana
Atish Dipankar
AD
Mukhopadhyay
Subrata
S
D001965:Bromides / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D006860:Hydrogen Bonding; D007477:Ions / Q000737:chemistry; D046911:Macromolecular Substances / Q000138:chemical synthesis* / Q000737:chemistry; D008958:Models, Molecular; D011725:Pyridines / Q000138:chemical synthesis* / Q000737:chemistry; D014867:Water / Q000737:chemistry*
C545335:4'-p-tolyl-2,2',6',2''-terpyridine; D001965:Bromides; D002712:Chlorides; D007477:Ions; D046911:Macromolecular Substances; D011725:Pyridines; D014867:Water