Synthesis, PtS-type structure, and anomalous mechanics of the Cd(CN)2 precursor Cd(NH3 )2 [Cd(CN)4

Dalton Transactions : an International Journal of Inorganic Chemistry
Chloe S CoatesAndrew L Goodwin

Abstract

We report the nonaqueous synthesis of Cd(CN)2 by oxidation of cadmium metal with Hg(CN)2 in liquid ammonia. The reaction proceeds via an intermediate of composition Cd(NH3)2[Cd(CN)4], which converts to Cd(CN)2 on prolonged heating. Powder X-ray diffraction measurements allow us to determine the crystal structure of the previously-unreported Cd(NH3)2[Cd(CN)4], which we find to adopt a twofold interpenetrating PtS topology. We discuss the effect of partial oxidation on the Cd/Hg composition of this intermediate, as well as its implications for the reconstructive nature of the deammination process. Variable-temperature X-ray diffraction measurements allow us to characterise the anisotropic negative thermal expansion (NTE) behaviour of Cd(NH3)2[Cd(CN)4] together with the effect of Cd/Hg substitution; ab initio density functional theory (DFT) calculations reveal a similarly anomalous mechanical response in the form of both negative linear compressibility (NLC) and negative Poisson's ratios.

References

Mar 21, 1998·Science·R H BaughmanS O Dantas
Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Jan 1, 1993·Physical Review. B, Condensed Matter·G Kresse, J Hafner
Jul 23, 2011·Journal of the American Chemical Society·Andrew B CairnsAndrew L Goodwin
Oct 25, 2011·Nature Materials·G N GreavesT Rouxel
Apr 3, 2012·Physical Review Letters·Jin-Chong TanAnthony K Cheetham
Apr 24, 2012·The Journal of Chemical Physics·Jochen Autschbach
Apr 24, 2013·Journal of the American Chemical Society·Ines E CollingsAndrew L Goodwin
May 10, 2013·The Journal of Chemical Physics·Aurélie U OrtizFrançois-Xavier Coudert
May 29, 2015·Physical Chemistry Chemical Physics : PCCP·Andrew B Cairns, Andrew L Goodwin
May 21, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Romain GaillacFrançois-Xavier Coudert
Jun 19, 1998·Angewandte Chemie·Stuart R Batten, Richard Robson

❮ Previous
Next ❯

Citations

Jan 19, 2019·Physical Chemistry Chemical Physics : PCCP·Francisco Colmenero
Jan 31, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Francisco ColmeneroVicente Timón
Apr 17, 2021·Nature Communications·Chloe S CoatesAndrew L Goodwin

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
neutron
neutron-scattering
neutron scattering
NMR

Software Mentioned

ELATE
PASCal
TOPAS
Vienna ab initio simulation package ( VASP )
VASP
FINDSYM

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.