ISSN:
1572-8854
Keywords:
Azole
;
triazene
;
Pd(II)
;
Cu(II)
;
structure
;
Raman
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The crystal and molecular structure of the complex [Pd(batt)Cl]·CH3OH, in which Hbatt is 1,3-bis[3-(5-amino-1,2,4-triazolyl)]triazene, has been determined by X-ray diffraction methods. The crystals are triclinic, space group $$P_{\bar 1} $$ (a = 10.1883(9) Å, b = 10.5095(8)Å, c = 13.1760(11) Å, α = 94.518(6)°, β = 109.040(7)°, γ = 113.678(7)°; Z = 4). The deprotonated batt− ligand exhibits terdentate chelate coordination with a new nitro-type ligation mode of the triazenido group and N4 coordination of the two outer triazolyl substituents. The asymmetric unit contains two crystallographically independent, almost parallel Pd(batt)Cl molecules with Pd–Pd contacts of 3.4584(7)Å and two independent methanol molecules. The complexes are packed in a layer structure with numerous intermolecular H-bond connections. Raman spectra have been recorded for various excitation wavelengths along the contour of the intense triazenido π-π* absorption band at 465 nm and resonance profiles measured for the most important Raman bands. A comparison is made with the analog [Cu(batt)Cl] complex. Structural and spectral differences between the two molecules are emphasized and related to differences in metal-ligand bonding.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022456023875
Permalink
