
TY  - JOUR
A1  - Taylor, D 
T1  - The crystal and molecular structure of 1&#945;,9&#946;-Dichloro-2,2,10,10-tetramethoxy[2,2](2,6)pyridinophane
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1978
VL  - 31
IS  - 9
SP  - 1953
EP  - 1957
KW  - 
UR  - https://doi.org/10.1071/CH9781953 
N2  - Crystals of the title compound, C18H20Cl2N2O4, are monoclinic, a 14.706(1), b 17.168(1), c 7.269(1) &#506;, &#946; 92.72(1)&#176;, space group P21/c with Z = 4. The structure was solved from diffractometer data by direct methods. Block-diagonal least-squares refinement converged at R 0.037, Rw 0.045 for 2103 reflections with I &#8805; 3&#963;(I) which had been corrected for absorption (&#956; 34.0 cm-1). The asymmetric unit is comprised of two independent half-molecules, each molecule being centrosymmetric. The pyridine rings are distorted from planarity, with a maximum deviation of 0.10 &#506; at the nitrogen atoms, as a consequence of the short intramolecular N...N contacts of 2.476(4) and 2.473(5) &#506;. 
ER  -

