
TY  - JOUR
A1  - Ghiggino, Kenneth P. 
A1  - Grannas, Martin J. 
A1  - Koay, Melissa S. 
A1  - Mariotti, Andrew W. A. 
A1  - McFadyen, W. David 
A1  - Tregloan, Peter A. 
T1  - <emph type="2">Short Communication</emph>: Cobalt(III) Complexes of Monobenzyl-Cyclam Macrocycle Derivatives
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2001
VL  - 54
IS  - 2
SP  - 101
EP  - 104
KW  - 
UR  - https://doi.org/10.1071/CH01032 
N2  - Two dichlorocobalt(III) complexes of ligands L1 and L3 in which 4-R-benzyl moieties (R = NO2, NH2) are either N-bonded (1-position) or C-bonded (6-position) to the 1,4,8,11-tetraazacyclotetradecane (cyclam) macrocycle have been prepared and characterized: L1 = 1-(4-nitrobenzyl)cyclam; L3 = 6-(4-aminobenzyl)cyclam. The X-ray crystal structure of trans-&#91;Co(L1)Cl2&#93;ClO4 &#123;M 564.73, monoclinic P21/c (No. 14); a 13.1987(14), b 11.7701(11), c 14.9305(14) &#197;, &#946; 97.692(9)&#x02DA;; V 2298.6(4) &#197;3. Z 4. Dc 1.632 g cm&#8211;3; final R1 0.0282, wR2 0.0671 (3438 refls Fo &#62; 4&#963;Fo), &#91;for all 4022 unique data R1 0.0366, wR2 0.0717&#93;&#125; shows a distorted octahedral stereochemistry at Co, with a Cl&#8211;Co&#8211;Cl angle of 174&#x02DA;. The X-ray crystal structure of trans-&#91;Co(L3)Cl2&#93;Cl&#183;H2O &#123;M 488.77; monoclinic P21/n (No. 14); a 10.5781(12), b 13.536(2), c 15.065(3) &#197;, &#946; 101.027(13)&#x02DA;; V 2117.3(6) &#197;3. Z 4. Dc 1.207 g cm&#8211;3; final R1 0.0284, wR2 0.0727 (5296 refls Fo &#62; 4&#963;Fo), &#91;for all 7928 data R1 0.0345, wR2 0.0762&#93;&#125; shows a less distorted octahedral stereochemistry. The Cl&#8211;Co&#8211;Cl angle is essentially linear, 179.80(14)&#x02DA;. The cyclam moieties in both structures display the trans-III conformation. Manuscript received: 11 April 2001. 
ER  -

