Abstract
With the object of isolating monomeric molybdenum(V) in a sulphur ligand environment we have studied the reactions of sodium molybdate in aqueous solution with the insoluble chelating poly(iminoethylene)dithiocarbamate copolymer. From neutral solutions, molybdate binds to basic nitrogen groups of the polymer. Under acidic conditions part of the molybdate is bound as a polymolybdate ion and part is reduced to molybdenum(V), including monomeric paramagnetic molybdenum(V) bound to four dithiocarbamate groups in a species structurally analogous to the [Mo(Et 2NCS 2) 4] + ion. The monomeric tetrakis species is formed under conditions when, from homogeneous aqueous solution, dimeric diamagnetic oxomolybdenum(V) complexes are mainly obtained. From molybdenum(V) in concentrated hydrochloric acid we obtained paramagnetic complexes containing the [MoOCl 4] − ion ( g = 1.949) which, in contact with water, gave molybdenum(V)-sulphur species ( g = 1.982). The IR, UV-visible and ESR spectra and the magnetic moments of the molybdenum-polymer complexes are reported, as are their reactions with nitrate. The relevance of the results to the mechanism of assimilation of molybdenum(VI) in biological systems is discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
