References

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H. ADAMSKY: Zur Theorie der Ligandenfeldspektren niedersymmetrischer Komplexverbindungen. Untersuchungen an Cr(III)-Pentamminen., Dissertation, Universit"at D"usseldorf, 1995.

2

M. A. ATANASOV, T. SCH"ONHERR: The Role of -Bonding for Trigonal Level Splittings in Chelate Complexes. 3. The Lowest Electronic States in , Inorg. Chem., 29 (1990), S. 4545.

3

M. A. ATANASOV, T. SCH"ONHERR, H.-H. SCHMIDTKE: The Role of the -Bonding Network for Trigonal Level Splittings of tris-Bidentate and , Theoret. Chim. Acta, 71 (1987), S. 59.

4

P. E. HOGGARD: Differential Orbital Expansion in Tetragonal Systems, Z. Naturforschg., 37a (1982), S. 1096.

5

height 2pt depth -1.6pt width 23pt: Sharp Line Electronic Transitions and Metal-Ligand Angular Geometry, Coord. Chem. Rev., 70 (1986), S. 85.

6

C. K. JøRGENSEN: Modern Aspects of Ligand Field Theory, North-Holland Publishing Company, Amsterdam, 1971.

7

H. J. MINK, H.-H. SCHMIDTKE.: Optical properties of . A paramagnetic complex with planar structure, Chem. Phys. Letters, 231 (1994), S. 235.

8

J. R. PERUMAREDDI: Electronic Spectra of Quadrate Chromium(III) Complexes, Coord. Chem. Rev., 4 (1969), S. 73.

9

H.-H. SCHMIDTKE, H. ADAMSKY, T. SCH"ONHERR: Pentaamminechromium(III) Level Properties as Determined from Vibronic Spectra and Crystal Field Calculations, Bull. Chem. Soc. Jpn., 61 (1988), S. 59.