
%0 Journal Article
%A Hambley, TW 
%A Hambley, TW 
%A Lawrance, GA 
%A Lawrance, GA 
%A Maeder, M 
%A Maeder, M 
%A Molloy, KJ 
%A Molloy, KJ 
%A Rossignoli, M 
%A Rossignoli, M 
%T Coordination of 5-Methyl-3,7-diazanonane-1,5,9-triamine (L) to Rhodium(III). Crystal Structure of <I>fac</I>-[Rh(H<sub>2</sub>L)Cl<sub>3</sub>] Cl(ClO<sub>4</sub>).3H<sub>2</sub>O
%J Australian Journal of Chemistry
%D 1994/05/01
%V 47
%N 5
%P 829-836
%K 
%R https://doi.org/10.1071/CH9940829
%U https://www.publish.csiro.au/paper/CH9940829 
%X The branched, potentially quinquedentate , 5-methyl-3,7-diazanonane-1,5,9-triamine (1) reacts in hot water with rhodium(III) chloride to yield fac -[ Rh (H2(1))Cl3]2+. Only upon extended reflux for several weeks is coordination as a quinquedentate achieved. The fac complex was crystallized readily as a mixed chloride perchlorate  trihydrate salt, in the triclinic space group P&#299; , a 8.666(2), b 10.319(2), c 12.558(3) &#506;, &#945; 94.34(2), &#946; 98.86(2), &#947; 97.75(2)&#176;, Z = 2; a single-crystal X-ray structure determination was refined to Rw 0.037 for 3703 'observed' reflections. The central primary amine and two adjacent secondary amines occupy an octahedral face, with the chloro ligands then necessarily fac also. The Rh -N distances vary, with the shortest distance to the primary amine [2.023(2)&#506;] rather than to the secondary amines [2.066(2), 2.077(2) &#506;], as do the Rh-Cl distances [range 2.345(1)-2.369(1)&#506;]. The two primary amines on the chain terminals remain uncoordinated, the central facially capping unit preferring coordination first, possibly indicating a general intermediate for coordination of polydentate l igands containing this type of unit. 
