TY - JOUR
T1 - The effect of steric hindrance on the association of telluradiazoles through Te-N secondary bonding interactions
AU - Cozzolino, Anthony F.
AU - Britten, James F.
AU - Vargas-Baca, Ignacio
PY - 2006/1
Y1 - 2006/1
N2 - DFT calculations were used to compare the magnitude of steric repulsion to the strength of secondary bonding interactions (SBIs) in the (Te-N)2 supramolecular synthon to explain or predict the supramolecular structures assembled by two derivatives of the 1,2,5-telluradiazole ring: benzo-2,1,3-telluradiazole (4c) and 3,6-dibromobenzo-2,1,3-telluradiazole (5). The crystallographically determined structures were consistent with the computational predictions. In sharp contrast with the previously known structures of its sulfur and selenium analogues, 4c forms infinite ribbon chains in the solid state with 2.682(7)-2.720(7) Å Te-N SBIs. Steric hindrance in 5 restricted the supramolecular association to form discrete dimers with 2.697(8) Å Te-N SBIs. In addition to discrete dimers, the dibromo derivative crystallizes as solvated dimers in 5·DMSO with 2.834(5) Å Te-O SBIs. Other weaker SBIs were identified in the crystal lattices and were assessed by the computational method.
AB - DFT calculations were used to compare the magnitude of steric repulsion to the strength of secondary bonding interactions (SBIs) in the (Te-N)2 supramolecular synthon to explain or predict the supramolecular structures assembled by two derivatives of the 1,2,5-telluradiazole ring: benzo-2,1,3-telluradiazole (4c) and 3,6-dibromobenzo-2,1,3-telluradiazole (5). The crystallographically determined structures were consistent with the computational predictions. In sharp contrast with the previously known structures of its sulfur and selenium analogues, 4c forms infinite ribbon chains in the solid state with 2.682(7)-2.720(7) Å Te-N SBIs. Steric hindrance in 5 restricted the supramolecular association to form discrete dimers with 2.697(8) Å Te-N SBIs. In addition to discrete dimers, the dibromo derivative crystallizes as solvated dimers in 5·DMSO with 2.834(5) Å Te-O SBIs. Other weaker SBIs were identified in the crystal lattices and were assessed by the computational method.
UR - http://www.scopus.com/inward/record.url?scp=31144449118&partnerID=8YFLogxK
U2 - 10.1021/cg050260y
DO - 10.1021/cg050260y
M3 - Article
AN - SCOPUS:31144449118
SN - 1528-7483
VL - 6
SP - 181
EP - 186
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 1
ER -