V 560

Elemental analyses (C, H, and N) were performed at the Elemental Analysis Service Centre of Kyushu University. Copper(II) ions were quantified by titration with ethylenediaminetetraacetic acid in the presence of hydrochloric acid, using murexide as an indicator. IR spectra were recorded on a Jasco FT/IR-4100 FT-IR spectrometer. ¹H and ¹³C NMR spectra (400 MHz) on a Bruker-Biospin AV 400 NMR spectrometer in D₂O, electrospray ionization (ESI) mass spectra on a Waters Quattro micro API mass spectrometer in methanol, and electronic spectra on Jasco V-560 (200–800 nm) and Hitachi 330 (800–2000 nm) spectrophotometers. Molar conductance was measured in H₂O on a DKK AOL-10 conductivity meter at room temperature. Magnetic susceptibility measurements were performed with a Quantum Design MPMS-7 SQUID magnetometer in the temperature range from 1.9 to 300 K with a static field of 5 kOe. The polycrystalline samples were ground into fine powders in an agate mortar. The sample was wrapped with aluminum foil. Data were corrected for paramagnetism of the aluminum foil. The susceptibilities were corrected for the diamagnetism of the samples by means of Pascal’s constants.

Elemental analyses (C, H, and N) were performed at the Elemental Analysis Service Centre of Kyushu University. Iron(III) ions were quantified by titration with ethylenediaminetetraacetic acid in the presence of hydrochloric acid, using variamine blue B as an indicator. IR spectra were recorded on a Jasco FT/IR-4100 FT-IR spectrometer. Electronic spectra were measured at room temperature on Jasco V-560 (200–800 nm) and Hitachi 330 (800–2000 nm) spectrophotometers. Molar conductances were measured in MeOH on a DKK AOL-10 conductivity meter at room temperature. Magnetic susceptibility measurements were performed with a Quantum Design MPMS-7 SQUID magnetometer in the temperature range from 1.9 to 300 K with a static field of 5 kOe. The polycrystalline samples were ground into fine powders in an agate mortar. The sample was wrapped with aluminum foil for 1 and 2. The sample for 3 was loaded into a gelatin capsule. All data were corrected for paramagnetism of the aluminum foil or diamagnetism of the capsule. The susceptibilities were corrected for the diamagnetism of the samples by means of Pascal’s constants.