
TY  - JOUR
A1  - Busfield, WK 
A1  - Engelhardt, LM 
A1  - Healy, PC 
A1  - Jenkins, ID 
A1  - Thang, SH 
A1  - White, AH 
T1  - The Structures of the Free-Radical Scavenger 1,1,3,3-Tetramethylisoindolin-2-Yloxyl, and of the Alkoxy Amine Derivative 5-(1,1,3,3-Tetramethylisoindolin-2-Yloxy)-1-Vinylpyrrolidin-2-One
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1986
VL  - 39
IS  - 2
SP  - 357
EP  - 365
KW  - 
UR  - https://doi.org/10.1071/CH9860357 
N2  - The structures of the title nitroxide , C12H16NO (1), and the alkoxy amine derivative, C18H24N2O2 (2), have been determined by single-crystal X-ray structural analyses. Crystals of (1) are monoclinic, space group Cc with a 11.585(6), b 11.697(10), c 16.753(8)&#506;, &#946; 94.33(6)&#176;, Z 8; R was 0.064 for 1226 independent reflections. The -C(NO)C- group is essentially planar (sum trigonal angles 359.9, 359.9&#176;, as is the five- membered ring. The N-O distances are 1.249(6), 1.252(8)&#506;. Crystals of (2) are monoclinic, space group P21/c, a 8.295(2), b 13.567(5), c 15.294(3)&#506;, &#946; 98.82(2)&#176;, Z 4; R was 0.051 for 1445 independent reflections. By contrast to (1) the geometry about the nitrogen atom is pyramidal (sum trigonal angles 328&#176;), and the corresponding five-membered ring has an envelope conformation with a nitrogen displacement of 0.45&#506;. The N-O distance is 1.439(4)&#506;. The high-resolution solid state 13C n.m.r . spectrum of (2) is discussed in relation to the X-ray structure. 
ER  -

