50423-48-8Relevant articles and documents
Ligand-Field Energy Splitting in Lanthanide-Based Single-Molecule Magnets by NMR Spectroscopy
Hiller, Markus,Krieg, Saskia,Ishikawa, Naoto,Enders, Markus
, p. 15285 - 15294 (2017)
A method for the experimental determination of ligand-field (LF) energy splitting in mononuclear lanthanide complexes, based purely on variable-temperature NMR spectroscopy, was developed. The application of this method in an isostructural series of anion
2,3-Dihalo- and 2,3,6,7-Tetrahaloanthracenes by Vollhardt Trimerization
Hoffmann, Hendrik,Mukanov, Diana,Ganschow, Michael,Rominger, Frank,Freudenberg, Jan,Bunz, Uwe H. F.
, p. 9826 - 9834 (2019/08/20)
We efficiently synthesized otherwise difficult to obtain 2,3- and 2,3,6,7-halogenated anthracenes with diverse east/west substituents. Key steps involve the (i) Vollhardt cyclization of bis(propargyl)benzenes with bis(trimethylsilyl)acetylene, (ii) halo-desilylation introducing chlorine, bromine, or iodine substituents, and (iii) dehydrogenation. Pd catalysis allows selective functionalization at the anthracenes' east/west positions. A tetrahydropentacene is synthesized and derivatized via the same strategy, employing tetrapropargylbenzene.
Homologation method for preparation of substituted pentacenes and naphthacenes
Takahashi, Tamotsu,Li, Shi,Huang, Wenying,Kong, Fanzhi,Nakajima, Kiyohiko,Shen, Baojian,Ohe, Takahiro,Kanno, Ken-Ichiro
, p. 7967 - 7977 (2007/10/03)
Multi-substituted pentacenes, such as 1,2,3,4,6,8,9,10,11,13- decasubstituted pentacenes (Type I), 1,2,3,4,6,-13-hexasubstituted pentacenes (Type II), 1,2,3,4-tetrasubstituted pentacenes (Type III), and 2,3-disubstituted pentacenes (Type IV), 1,2,3,4,6,11
