title: Crystal structure of rubidium methyl-diazo-tate.
abstract: The title compound, Rb+·H3CN2O-, has been crystallized in liquid ammonia as a reaction product of the reductive ammonolysis of the natural compound streptozocin. Elemental rubidium was used as reduction agent as it is soluble in liquid ammonia, forming a blue solution. Reductive bond cleavage in biogenic materials under kinetically controlled conditions offers a new approach to gain access to sustainably produced raw materials. The anion is nearly planar [dihedral angle O-N-N-C = -0.4 (2)°]. The Rb+cation has a coordination number of seven, and coordinates to five anions. One anion is boundviaboth its N atoms, one by both O and N, two anions are bound by only their O atoms, and the last is boundviathe N atom adjacent to the methyl group. The diazo-tate anions are bridged by cations and do not exhibit any direct contacts with each other. The cations form corrugated layers that propagate in the (-101) plane.
authors.affiliation: Institut für Anorganische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Grassl
authors.affiliation: Institut für Anorganische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany.
authors.forename: Nikolaus
authors.initials: N
authors.lastname: Korber
keywords: crystal structure; methyl­diazo­tate anion; reductive ammonolysis; rubidium cation; streptozocin