Vibrational spectra of hydrates of some metal(II) malonates

As a part of our vibrational spectroscopic investigations of crystalline hydrates of salts of malonic acid, the FT-IR spectra of the dihydrates of four metal(II) malonates were recorded at room temperature (RT) and the boiling temperature of liquid nitrogen (LNT) and studied together with their RT Raman spectra. The regions of the OCO stretchings are discussed in more detail, and the appearance of the characteristic bands is correlated with the available structural data.