Unravelling 100-Year-Old Mystery of Rosenheim's Transition-Metal Paramolybdate Complexes.

ABSTRACT: In 1916, Rosenheim reported the synthesis of transition-metal paramolybdate complexes of Co²⁺, Mn²⁺, and Cu²⁺ formulated as {M^II(MoO₄)₆}. However, later reports questioned the synthesis and structure of these compounds. Herein, we revisited this 100-year-old chemistry and clarified the nature of Rosenheim's complexes. We found that Rosenheim's synthesis method for {M^II(MoO₄)₆} (M = Co or Cu) indeed produced an Anderson-type [M^IIH₆Mo₆O₂₄]^4- cluster as the major product. Prolonged crystallization of the concentrated reaction mixture gave a Co²⁺-capped heptamolybdate or a Cu²⁺-linked octamolybdate, whereas crystallizati

SUBMITTER: Sugiarto 

PROVIDER: S-EPMC12284865 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature