Formation of a macrocycle from di-chloro-dimethyl-silane and a pyridoxalimine Schiff base ligand

Uwe Böhme; Anke Schwarzer; Betty Günther

doi:10.1107/S2056989021010185

Formation of a macrocycle from di-chloro-dimethyl-silane and a pyridoxalimine Schiff base ligand

Acta Crystallogr E Crystallogr Commun. 2021 Oct 13;77(Pt 11):1099-1102. doi: 10.1107/S2056989021010185. eCollection 2021 Nov 1.

Authors

Uwe Böhme¹, Anke Schwarzer², Betty Günther¹

Affiliations

¹ Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599 Freiberg, Germany.
² Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599 Freiberg, Germany.

Abstract

The reaction of di-chloro-dimethyl-silane with a polydentate Schiff base ligand derived from pyridoxal and 2-ethano-lamine yielded the macrocyclic silicon compound (8E,22E)-4,4,12,18,18,26-hexa-methyl-3,5,17,19-tetra-oxa-8,13,22,27-tetra-aza-4,18-disilatri-cyclo-[22.4.0.0^10,15]octa-cosa-1(24),8,10,12,14,22,25,27-octa-ene-11,25-diol, C₂₄H₃₆N₄O₆Si₂. The asymmetric unit contains the half macrocycle with an intra-molecular O-H⋯N hydrogen bond between the imine nitro-gen atom and a neighbouring oxygen atom. The crystal structure is dominated by C-H⋯O and C-H⋯π inter-actions, which form a high ordered mol-ecular network.

Keywords: Schiff base; crystal structure; macrocycle; organosiloxane; pyridoxal.

Grants and funding

This work was funded by Open Access Funding by the Publication Fund of the TU Bergakademie Freiberg.