Issue 25, 2019

Chloride carbodiimide K12Pb51(CN2)30Cl54 with an unprecedented 45 Å unit cell axis and a large birefringence

Abstract

A novel chloride carbodiimide, K12Pb51(CN2)30Cl54 (1), was successfully synthesized by solid state metathesis reaction. It exhibits the longest unit cell value reported among all known carbodiimides, caused by the superhelical configuration of the stereochemically active lone pair (SALP) Pb2+ cations rotating along the c axis. In addition, 1 has a large birefringence of 0.094 at 1064 nm resulting from the synergistic effect of SALP Pb2+ cations and linear (CN2)2− groups based on first principles calculation.

Graphical abstract: Chloride carbodiimide K12Pb51(CN2)30Cl54 with an unprecedented 45 Å unit cell axis and a large birefringence

Supplementary files

Article information

Article type
Letter
Submitted
12 Mar 2019
Accepted
28 May 2019
First published
30 May 2019

New J. Chem., 2019,43, 9766-9770

Chloride carbodiimide K12Pb51(CN2)30Cl54 with an unprecedented 45 Å unit cell axis and a large birefringence

X. Meng, F. Liang, W. Yin, Z. Lin and M. Xia, New J. Chem., 2019, 43, 9766 DOI: 10.1039/C9NJ01298B

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