Le fluorure de tétraphénylstibonium. Mesures dans l'ultra-violet

Lewis acidic stiborafluorenes for the fluorescence turn-on sensing of fluoride in drinking water at ppm concentrations

“…[15][16][17][18][19][20] While ample precedents show that group 13 Lewis acids are especially well suited for this purpose, [21][22][23][24][25][26][27] recent advances in the chemistry of organo-group 15 compounds as Lewis acids [28][29][30][31][32] and uorophores [33][34][35][36][37] have led us to question whether organoantimony(V) species may also be competent for the complexation and uorescence sensing of uoride ions in protic solvents. [38][39][40][41][42][43][44] With this objective in mind, we have recently investigated the 9-anthryltriphenylstibonium cation ([AntPh 3 Sb] + ) and found that this cation captures uoride in 9/1 vol. water-DMSO to afford the corresponding uorostiborane AntPh 3 SbF.…”

Hypervalent diorganoantimony(iii) fluorides via diorganoantimony(iii) cations – a general method of synthesis

“…As expected, one nitrogen atom is strongly coordinated to the metal [Sb( ]. In the molecules of the chiral uorides 6 and 8, which contain one phenyl group and one organic ligand of the same type as in 5 and 7, again the nitrogen atom of the pendant arm is strongly coordinated to the metal atom [Sb (1) Taking into account both intramolecular N/Sb interactions the coordination geometry around the antimony atom in 5 and 7 is distorted square pyramidal [(C,N) 2 SbF core; hypervalent 12-Sb-5 species 35,36 ], with an ipso carbon atom in the apical position ( Fig. 2 and S20 †).…”

“…42 The drawings were created with the Diamond program. 43 1 H NMR (500 MHz, CDCl 3 ): d 1.17 [d, 3 J H,H ¼ 6.7 Hz, 6H, H-8 0 a1, CH(CH 3 ) 2 ], 1.38 [d, 3 J H,H ¼ 6.8 Hz, 6H, H-8 0 a2, CH(CH 3 ) 2 ], 1.43 [d, 3 J H,H ¼ 6.7 Hz, 6H, H-8 0 b1, CH(CH 3 ) 2 ], 1.51 [d, 3 J H,H ¼ 6.6 Hz, 6H, H-8 0 b2, CH(CH 3 ) 2 ], 3.03 [sept, 3 J H,H ¼ 6.7 Hz, 2H, H-7 0 b, CH(CH 3 ) 2 ], 3.29 [sept, 3 J H,H ¼ 6.7 Hz, 2H, H-7 0 a, CH(CH 3 ) 2 ], 7.34 (dd, 3 J H,H ¼ 6.3 Hz, 4 J H,H ¼ 2.8 Hz, 2H, H-3 0 a or H-3 0 b, C 6 H 3 ), 7.46 (m, 4H, H-3 0 b or H-3 0 a, H-4 0 , C 6 H 3 ), 7.52 (d, 3 J H,H ¼ 7.4 Hz, 2H, H-6, C 6 H 4 ), 7.59 (ddd, 3 J H,H ¼ 7.5 Hz, 4 J H,H ¼ 1.2 Hz, 2H, H-5, C 6 H 4 ), 7.70 (ddd, 3 J H,H ¼ 7.5 Hz, 4 J H,H ¼ 1.1 Hz, 2H, H-4, C 6 H 4 ), 8.17 (dd, 3 J H,H ¼ 7.6 Hz, 4 J H,H ¼ 0.9 Hz, 2H, H-3, C 6 H 4 ), 8.94 (s, 2H, H-7, CH]N). 13…”

“…[1][2][3][4][5][6] A survey of the literature concerning organoantimony(III) uorides revealed some interesting aspects with regard to the preparation of the few R 2 SbF 7-12 and RSbF 2 (ref. [11][12][13][14] species reported so far.…”

“…The interest in the development of new sensors for the potentially toxic uoride anion led to recent achievements based on main group chemistry and, particularly, organoantimony(III) and -antimony(V) compounds. [1][2][3][4][5][6] A survey of the literature concerning organoantimony(III) uorides revealed some interesting aspects with regard to the preparation of the few R 2 SbF 7-12 and RSbF 2 (ref. [11][12][13][14] species reported so far.…”