Answers are grounded in this paper and cite their sources.
A deprotonated ethylenediamine ruthenium complex, previously reported to be an RuVI–amide system, has been shown by X-ray photoelectron spectroscopy in conjunction with its diamagnetism, to be a ruthenium(II) complex, and shown by n.m.r. spectroscopy to contain an α-di-imine chelate ring.
No takes yet. Share an insight, caveat, or question.
Lane et al. (1971) studied this question.