ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Skeletal metamorphosis of carbohydrazide: a novel reaction toward 3D EMOFs based on Co(II) and Ni(II)

Sergey G. Il’yasov, Dmitri S. Il’yasov, Tatyana V. Rybalova, and Natalia V. Pervukhina

Laboratory for Low-Tonnage Chemistry, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk, Russia

E-mail: ilysow@ipcet.ru

Received: 17 October 2025  Accepted: 3 March 2026

Abstract:

This study reports a metamorphosis of carbohydrazide (CHZ) that simultaneously acts as both a ligand and a linker in a complexation reaction with the Co(II) and Ni(II) cations in the synthesis of new 3D energetic metal-organic frameworks (EMOFs) containing dinitramide (DNA). The 3D coordination model of CHZ differs from the known ones. Complexes [M(CHZ)₂](N(NO₂))₂ (where M: Co, Ni) demonstrate excellent characteristics, including higher density, improved oxygen balance, and high energy compared to their tris-carbohydrazide analogs [M(CHZ)₃](N(NO₂))₂ (where M: Co, Ni). X-ray diffraction shows a continuous framework formed by CHZ via the µ-N, O, N′ coordination with metal cations (Co, Ni).

Graphical abstract

Keywords: Cobalt(II); Carbohydrazide; Dinitramide; Coordination compounds; Structure; Skeletal editing

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-026-04778-6

Chemical Papers 80 (7) 8357–8364 (2026)