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Structure and Properties of N->Sn-Coordinated Stannaoxidoborates Containing a SnB4O6 Unit

Authors: Bureš Filip | Mairychová Barbora | Kityk I. V. | Maciag Artur | Klikar Milan | Růžička Aleš | Dostál Libor | Jambor Roman

Year: 2016

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Structure and Properties of N->Sn-Coordinated Stannaoxidoborates Containing a SnB4O6 Unit	We report here the synthesis of four new N→Sn-coordinated stannaoxidoborates H[LSnB4O6R4] {L = [2,6-(Me2NCH2)C6H3]- and R = Ph, 4-Br-Ph, 3,5-(CF3)2-Ph, and 4-CHO-Ph} containing a nonsymmetric SnB4O6 unit (Figure 1). These compounds represent new derivatives of the pentaborates [B5O6R4]- in which the central boron is substituted by a tin atom. Identities of all target compounds were characterized by means of elemental analysis, electrospray ionization mass spectrometry, and NMR spectroscopy. The molecular structures of three compounds were also confirmed by single-crystal X-ray diffraction analysis. The structures of novel N→Sn-coordinated stannaoxidoborates consist of a spirobicyclic arrangement, with two six-membered SnB2O3 rings at the tin atom providing the new stannaoxidoborate [LSnB4O6R4]- motif, which is compensated by the proton atom coordinated to the Me2N group of the ligand L. The linear and thermal properties were studied with the help of electronic absorption spectra and differential scanning calorimetry. In addition, the presence of the nonsymmetric stannaoxidoborate SnB4O6 unit prompted us to investigate their second-order nonlinear-optical properties. Subsequent structure-property relationships were evaluated.	N->Sn-Coordinated; Stannaoxidoborates; SnB4O6;