
TY  - JOUR
A1  - Curtis, NF 
A1  - Milestone, TN 
T1  - Nickel(II) and copper(II) complexes of the macrocyclic ligand 5,7,7-Trimethyl-1,4,8,11-tetraazacyclotetradec-4-ene
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1975
VL  - 28
IS  - 2
SP  - 275
EP  - 283
KW  - 
UR  - https://doi.org/10.1071/CH9750275 
N2  - Nickel(II) and copper(II) complexes of 1,4,8,11-tetraazaundecane, (L), react with acetone, diacetone alcohol or mesityl oxide to form complexes of the macrocyclic ligand 5,7,7-trimethyl-1,4,8,11-tetra- azacyclotetradec-4-ene. For the nickel(II) cation, singlet ground state, square planar, salts are formed with poorly coordinating anions such as tetrachlorozincate, and triplet ground state, pseudoocta- hedral compounds with coordinating anions. These occur as trans compounds (macrocycle in planar coordination) for the unidentate anions NCS-, N3- and Cl- and as cis compounds (macrocycle in folded coordination)for the chelating anions acetylacetonate and oxalate. Different configurations of the chiral nitrogen centres are optimum for planar and for folded coordination of the macrocycle. 
ER  -

