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- W4375862110 abstract "The family of practically requested “common” silatrane derivatives of triethanolamine X-Si(OCH2CH2)3N, 1, was enlarged with the first representatives of 3,4,6,7,10,11-tribenzo-2,8,9trioxa-5-aza-1-silatricyclo(3.3.3.0^1,5^)undecanes X-Si(O-para-R-C6H3)3N, tribenzsilatranes 2 (R = H (a), Me (b), F (c)), carrying the substituent R in the side aromatic rings. These compounds were prepared via the transesterification of phenyl trimethoxysilane with the corresponding triphenol amines and studied using XRD and DFT calculations. These derivatives of 1-X-(4-R-2,2′,2′′-nitrilotriphenoxy)silane are expected to have, as their parent “common” silatranes 1, diverse biological and pharma activities. A common characteristic feature of the molecular structures of both 1 and 2 is the presence of an intramolecular dative bond N→Si whose existence is evidenced by geometric and quantum topological (AIM) criteria. In the crystals, the length of this bond (dSiN) is noticeably longer in tribenzsilatranes than in 1. The results of DFT B3PW91/6-311++G(d,p) calculations suggest the reason for this to be the more rigid nature of the potential functions of the N→Si bond deformation in 2 compared to 1. The relative degree of “softness”/”hardness” of the potential functions can be assessed from the difference in the calculated values of dSiN in isolated molecules 1 and 2a–c and in their crystals." @default.
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- W4375862110 date "2023-05-06" @default.
- W4375862110 modified "2023-10-18" @default.
- W4375862110 title "Crystal Structure of New 1-Phenyl-Substituted Tribenzsilatranes" @default.
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- W4375862110 doi "https://doi.org/10.3390/cryst13050772" @default.
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