Sodium trans-Bis(methyliminodiacetato-O,N,O)chromate(III), Na[Cr(C5H7NO4)2]

In the title compound, Na[CrIII{RN(CH2CO2)2}2], where R is CH3, the methyliminodiacetate anions function as tridentate ligands, defining a slightly distorted octahedral coordination at the CrIII ion with the N atoms in a trans configuration. The Cr—N distance of 2.060 (2) A is slightly shorter than the values found in the complexes where R is bulkier, i,e, an isopropyl or tert-butyl group, whereas the Cr—O bond lengths vary little as the size of R is changed. The methyliminodiacetato complexes so far studied.