English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The compound [Cu(CN-acac)Me 2 en(Br)] (Me 2 en denotes N,N-dimethyl-1,2-diaminoethane) was prepared and investigated by means of structural (X-Ray diffraction) and spectroscopic (IR and electronic) measurements. The compound crystallizes in the monoclinic space group  P 2 1 / c  with  a  = 5.959(1) Å,  b  = 7.465(2) Å,  c  = 19.338(3) Å,  β  = 90.89(2)° and  Z  = 4. The structure consists of discrete [Cu(CN-acac)Me 2 en(Br)] monomeric units, in which copper is five-coordinated. The 1,2-diamine adopts the  gauche  conformation with a torsional angle of 51.31°, coordinates as bidentate ligand through the nitrogen atoms, and attains the  λ  configuration. The anion of the 3-cyano-2,4-pentanedione, CN-acac − , is bonded through the oxygen atoms and the six-membered metallocyclic ring exhibits a semi  chair  conformation. The nitrogen and oxygen donor atoms form a square plane. Copper is also bonded to the bromine atom and a distorted square pyramidal structure around copper exists. The inequalities in the Cu–N distances suggest a second-order Jahn-Teller deformation while the elongation of the Cu–Br bonds implicates  d - s  orbital mixing. The ligand field excitation energy is appreciably lower than that observed in the [Cu(CN-acac)Me 2 en] +  entity. The principal stretching vibrations are assigned and discussed in the light of the structure.

zeitschrift für kristallographie - crystalline materials

Influence of coordinating anions on the stereochemistry of mixed-ligand copper (II) compounds. Crystal structure and spectra of bromo (3-cyano-2,4-pentanedionato) ( N , N -dimethyl-1,2-diaminoethane)copper(II)