Chromium I Piano-stool Complex

Ordinarily, there is no way of extracting the orientation of the principal axes of the g-matrix from a powder or frozen solution ESR spectrum. However, there are exceptional circumstances in which nature is kind to the experimentalist  

The symmetry of the static complex is at most Cs, requiring one of the g-matrix principal axes to be normal to the plane of symmetry - this is assumed 

Rotation about the y-axis by (i diagonalizes the matrix, and we find  

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