XPS studies on the structure of three important members of heteronitro-tricyclic compounds have been reported by the present authors before. Experimental results have confirmed the existence of N→B, N→Si and N→Ti d...XPS studies on the structure of three important members of heteronitro-tricyclic compounds have been reported by the present authors before. Experimental results have confirmed the existence of N→B, N→Si and N→Ti dative bonds in these compounds respectively. And the affection of different substituents and carbonyl groups in the molecular ring for these dative bonds has also been investigated and the EHMO (extended Huckel Molecular Orbital) theoretical calculation for silatrane展开更多
Recently, the extraordinary structures and physiological activities of silatrane compounds have been paid much attention to and been studied with various physicoehemical methods by many authors. The concept of pentaco...Recently, the extraordinary structures and physiological activities of silatrane compounds have been paid much attention to and been studied with various physicoehemical methods by many authors. The concept of pentacoordinated silicon and tetracoordinated nitrogen in these compounds has been proposed. However, there is still much controversy about it.展开更多
The study of X-ray photoelectron spectroscopy (XPS) and EHMO (extended H(?)ckel molecular orbital) theoretical calculation on the structure of boratranes and silatranes which are two important members of heteronitro-t...The study of X-ray photoelectron spectroscopy (XPS) and EHMO (extended H(?)ckel molecular orbital) theoretical calculation on the structure of boratranes and silatranes which are two important members of heteronitro-tricyclic compounds have been reported by the authors. Experimental and the calculated results can all confirm the existence of the dative bond in these compounds.展开更多
The X-ray photoelectron spectroscopy (XPS) study of the structure of 1-vinylsilatrane has been reported by the present authors before which confirmed the existence of the dative bond between the nitrogen and the silic...The X-ray photoelectron spectroscopy (XPS) study of the structure of 1-vinylsilatrane has been reported by the present authors before which confirmed the existence of the dative bond between the nitrogen and the silicon atoms and in another paper the influence of the different substituents on the strength of the dative bond展开更多
In the last ten years, a series of new organosilicon compounds known as 'silatranes' with highly specific biological actvity have received much attention from scientists. In 1966, Voronkov announced that these...In the last ten years, a series of new organosilicon compounds known as 'silatranes' with highly specific biological actvity have received much attention from scientists. In 1966, Voronkov announced that these compounds possess transannular structure between penta-coordinated silicon and tetracoordinated nitrogen, such展开更多
文摘XPS studies on the structure of three important members of heteronitro-tricyclic compounds have been reported by the present authors before. Experimental results have confirmed the existence of N→B, N→Si and N→Ti dative bonds in these compounds respectively. And the affection of different substituents and carbonyl groups in the molecular ring for these dative bonds has also been investigated and the EHMO (extended Huckel Molecular Orbital) theoretical calculation for silatrane
文摘Recently, the extraordinary structures and physiological activities of silatrane compounds have been paid much attention to and been studied with various physicoehemical methods by many authors. The concept of pentacoordinated silicon and tetracoordinated nitrogen in these compounds has been proposed. However, there is still much controversy about it.
文摘The study of X-ray photoelectron spectroscopy (XPS) and EHMO (extended H(?)ckel molecular orbital) theoretical calculation on the structure of boratranes and silatranes which are two important members of heteronitro-tricyclic compounds have been reported by the authors. Experimental and the calculated results can all confirm the existence of the dative bond in these compounds.
文摘The X-ray photoelectron spectroscopy (XPS) study of the structure of 1-vinylsilatrane has been reported by the present authors before which confirmed the existence of the dative bond between the nitrogen and the silicon atoms and in another paper the influence of the different substituents on the strength of the dative bond
文摘In the last ten years, a series of new organosilicon compounds known as 'silatranes' with highly specific biological actvity have received much attention from scientists. In 1966, Voronkov announced that these compounds possess transannular structure between penta-coordinated silicon and tetracoordinated nitrogen, such
