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Oxides, Nitrides and Halides


 

(a) Oxides, Nitrides and Halides

vM=O these often occur around 1000 cm-1, the position is sensitive to coordination environment
vM=N 1200-950 cm-1
vC=N 2200-2000 cm-1
vM-X dependent on X and geometry

Metal-halogen stretching modes for some nickel complexes

 

linear

 trans-planar

 cis-planar

 tetrahedral

octahedral

 

NiX2

Ni(PEt3)2X2

Ni(dppe)X2

Ni(PPh3)2X2

 Ni(py)4X2

X= Cl

521 cm-1

403 cm-1

341, 328 cm-1

341, 305 cm-1

207 cm-1

X= Br

 414 cm-1

338 cm-1

290, 266 cm-1

265, 232 cm-1

140 cm-1

 

 

 

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