Rectangular-Shaped Expanded
Phthalocyanines with Two
Central Metal Atoms
Osamu Matsushita
Valentina
M. Derkacheva
Atsuya Muranaka
Soji Shimizu
Masanobu Uchiyama
Evgeny A. Luk’yanets
Nagao Kobayashi
10.1021/ja209589x.s002
https://acs.figshare.com/articles/dataset/Rectangular_Shaped_Expanded_Phthalocyanines_with_Two_Central_Metal_Atoms/2547676
Expanded phthalocyanine (Pc) congeners with two Mo or
W central
metal ions and four isoindole ring moieties have been synthesized
using normal Pc formation conditions in the presence of urea. The
products have been characterized by electrochemistry; mass spectrometry
(MS); IR, electron paramagnetic resonance (EPR), NMR, electronic absorption,
and magnetic circular dichroism (MCD) spectroscopies; and X-ray analysis.
The X-ray structures have rectangular <i>C</i><sub>2<i>v</i></sub> symmetry and provide evidence that the central Mo
atoms are linked by a single bond and coordinated by two isoindole
nitrogen atoms and two nitrogen atoms from the amine moieties. The
electronic absorption bands extend into the 1200–1500 nm region.
This can be explained using Gouterman’s four-orbital theory.
The experimental NMR data and theoretical calculations provide evidence
for a heteroaromatic 22-π-electron conjugation system for the
ring-expanded Pc system, which satisfies Hückel’s (4<i>n</i> + 2)π aromaticity.
2016-02-22 05:12:40
Pc formation conditions
EPR
metal ions
electron
C 2v symmetry
nitrogen atoms
mass spectrometry
Mo atoms
NMR data
isoindole ring moieties
MS
amine moieties
evidence
isoindole nitrogen atoms
IR
MCD
Central Metal AtomsExpanded phthalocyanine
absorption bands