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Structural studies of diorganotin(IV) sulfonates: The synthesis of [(n-C4H9)2Sn{OSO2C6H3(CH3)2-2,5}2] and [(n-C4H9)2Sn{OSO2R)2·2(hexamethylphosphoric triamide)] [R=CH3, 4-C6H4CH3, 2,5-C6H3(CH3)2, 2,4,6-C6H2(CH3)3] and crystal structures of [(n-C4H9)2Sn(μ-OH)(OSO2C6H3(CH3)2-2,5)]2 and (n-C4H9)2Sn{OSO2R)2·2(hexamethylphosphoric triamide)] [R=4-C6H4CH3, 2,5-C6H3(CH3)2, 2,4,6-C6H2(CH3)3]

“…In the crystal lattice compound 2 exists in the dimeric form, which can be considered as built from the fourmembered [Sn(l 2 -OH) 2 Sn] core. This core is similar in geometry and conformation as observed in other reported structures [10,[18][19][20][21][22][23][24][25]. The five primary bonds to tin in 2 are to the two n-butyl groups [Sn-C(9) = 2.109 (4) [26][27][28], but are considerably shorter than the sum of their van der Waals radii of 3.71 Å [29].…”

Electrophilic C–H Borylation and Related Reactions of B–H Boron Cations

“…From 19 F and 13 C NMR data it is also apparent that in one of the isomers both CF 3 groups are magnetically equivalent, as expected in the N-bound isomer 12 , but they are distinctly different in the O-bound isomer 13 . Bistriflimide connectivity isomerism has not previously been observed in boron compounds (very few boron sulfonylimides have been reported so far), 7 although similar isomerism is a known phenomenon in Si bistriflimides. 8 …”

Polysulfonylamine, CXVIII Wasserstoffbrücken in kristallinen Onium-dimesylamiden: Drei prim. -Ammonium-dimesylamide mit zwei- oder dreidimensionalen Wasserstoffbrückenmustern/Polysulfonylamines, CXVIII Hydrogen Bonding in Crystalline Onium Dimesylamides: Three prim. -Ammonium Dimesylamides Exhibiting Two- or Three-Dimensional Hydrogen Bond Patterns

“…D eform a tionen in dieser G rößenordnung treten nur selten auf [4,5]; über eine noch stärker verzerrte Form des gleichen Anions (xn ca. 60, -7 0 , 180 und 54°), hervorgerufen durch zwölf von Harnstoff-M olekü-len ausgehende W asserstoffbrücken N -H ---N " / O, haben wir kürzlich berichtet [6 ].…”

“…5). Im Gegensatz dazu sind die E in heiten A über eine einzelne unabhängige HBrücke des genannten Typs zu finiten Cyclodimeren assoziiert (Abb 6. ).…”