From chromium-chromium quintuple bonds to molecular squares and porous coordination polymers.
Reaction of the quintuply bonded chromium(I) dimer [ApCrCrAp] (Ap = sterically demanding 2-aminopyridinate) with pyrazine yields a chromium(II) complex with a η(4):η(4) face-on coordinated pyrazine dianion. Reaction with 4,4'-bipyridine, on the other hand, completely cleaves the metal-metal bond, leading to a chromium(II)-based molecular square. XRD and magnetic measurements show ligand radical anions and a ferrimagnetic alignment of alternating metal and ligand magnetic moments. Controlled polymerization of the molecular square with pyrazine yields a porous coordination polymer featuring both reduced and nonreduced linkers.
Lehrstuhl Anorganische Chemie II, Universität Bayreuth , 95440 Bayreuth, Germany.
Awal
A
Noor
Emmanuel
E
Sobgwi Tamne
Benjamin
B
Oelkers
Tobias
T
Bauer
Serhiy
S
Demeshko
Franc
F
Meyer
Frank W
FW
Heinemann
Rhett
R
Kempe