Transition-metal complexes of superstructured cyclidene macrobicycles: structural features and their chemical consequences. 1. Complexes of the unbridged cyclidene ligands and of precursor ligands

Tuning the Properties of Neutral Tetraazamacrocyclic Complexes of Copper(II) and Nickel(II) for Use as Host–Guest Compounds with Bismacrocyclic Transition Metal Cations

“…In all cases, except for 10Ni , the macrocyclic ring is functionalised with two methoxycarbonyl groups, which can adopt either trans or cis conformations (see Figure 1, parts h and i). The 14‐membered ring of 10Ni has two types of substituents, namely two acyl and two methyl groups located trans to each other, thus confirming the structural results of Alcock et al7 and contrary to earlier reports 4,5. The 14‐membered macrocyclic ring in the structure of the free ligand 4 is not coplanar.…”

“…As a result, a bond‐length alternation is present in those parts of the molecules. In the case of 4Cu , 4Ni , 5Ni , 6Ni and 10Ni 4,5,7 the Cu II or Ni II ions are coordinated by the nitrogen atoms from the macrocyclic ligands to form square‐planar complexes. In the free ligands ( 4[HCl] 2 and 6[HPF 6 ] 2 ), all of the nitrogen atoms are protonated and the conformation of the molecule is completely different.…”

Neutral Ni(II) and Cu(II) complexes of tetraazatetraenemacrocyles

“…1, (MmMe 2 -n) 2 , m = 15, 16, n = 4, 6). 1 Compared with the compounds reported earlier by Jäger, 2 Alcock et al 3 and Busch and co-workers, 4,5 the monomeric donors studied in this work contain formyl instead of acetyl groups. Also, the monomers without methyl substituents were synthesized (Fig.…”

Synthesis and Characterization of Chiral Tetraaza Macrocyclic Nickel(II) and Palladium(II) Complexes

“…Half of the molecule of Ni[ee-TATE(Ac) 2 ] was found in the asymmetric unit of a monoclinic cell with the Ni atom in the inversion center. 18 The symmetry requirements led to rigorously planar coor-Scheme 1. Synthesis of Macrocyclic Complexes Figure 1.…”