Materials and Methods Model Complexes

NMR spectra were recorded, unless otherwise stated, at room temperature with a 300, 400 or 500 MHz Bruker AV 300/400/500 spectrometer. Chemical shifts are reported in S units relative to CHCI3 (6h = 7.24), d -MeOD (8h = 3.30), CD3CN (5h = 1.93), d -acetone (5h = 3.31) or d -DMSO (5h = 2.50). The following abbreviations were used s = singlet, d = doublet, t = triplet, dd = doublet of doublet, dt = doublet of triplet, m = multiplet. The software used for data processing was TOPSPIN 2.1 from BRUKER [26]. 

NMR spectra were recorded at room temperature with 85 % phosphoric acid as external standard (8p = 0.00). P NMR spectra of the Cd(ll) complexes were recorded with a 600 MHz Bruker AV600 spectrometer at room temperature in the digital acquisition mode (operating frequency 242 MHz) at the NMR facilities of the Anorganisch-Chemisches Institut, University of Heidelberg. 

Magnetic Moments in Solution were determined with the Evans method [28] using 

Solid State Magnetic Susceptibility Measurements were conducted with a MPMS-XL 5T superconducting quantum interference device (SQUID) from Quantum Design at the University of Heidelberg in collaboration with Professor Peter Comba and recorded as a function of the apphed field (0-5 T), and at temperatures ranging from 2 to 300 K (zero field cooled method). The powdered samples were pressed into a PTEE band to avoid field-induced orientation of the 

General FT-Infrared Spectroscopy was carried out with a Perkin Ehner FT-IR Spectrometer SPECTRUM 2000 with a Smiths DuraSampUR II ATR diamond window. 

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