Diorganozinn(IV)-Komplexe dreizähniger Carbazone - Strukturuntersuchungen im festen Zustand und in Lösung

One‐Step Preparation, Structural Assignment, and Xray Study of 2,2‐Di‐n‐butyl‐ and 2,2‐Diphenyl‐6‐aza‐1,3‐dioxa‐2‐stannabenzocyclononen‐4‐ones Derived from Amino Acids

“…The N1→Sn1 distances range from 2.145(4) Å in 6 g to 2.165(5) Å in 6 d . These values are shorter than those reported in the literature for n ‐butyl substituents (average of 2.206 Å for di‐ n ‐butyl‐(3,4,5‐trimethoxybenzoylsalicylahydrazonato)tin43 and di‐ n ‐butyl‐(salicylaldehyde semicarbazato‐ O , O′ , N )tin50), but are similar to those previously reported for diphenyl derivatives (average of 2.180 Å for ( N ‐(2‐hydroxyacetophenone)glycinato)‐diphenyltin,37 ( N ‐(2‐hydroxy‐5‐methylacetophenone)glycinato)‐diphenyltin( IV ),51 (1,9‐bis( o ‐phenolato)‐2,3,7,8‐tetraazanona‐1,3,6,8‐tetraene‐4,6‐diolato)bis(diphenyltin)benzene,42 diphenyl‐(2‐hydroxy‐ N ‐(2‐hydroxybenzylidene)anilinato)tin,47 and diphenyl‐( O ‐methyl‐ β ‐ N ‐(salicylmethylidene)carbazate)tin( IV )52). The Sn1–O1 distances range from 2.117(3) Å in 6 a to 2.159(3) Å in 6 g , and are thus similar to the values found in analogous carboxylic derivatives (2.139 Å) 37, 40.…”

“…The Sn1–O1 distances range from 2.117(3) Å in 6 a to 2.159(3) Å in 6 g , and are thus similar to the values found in analogous carboxylic derivatives (2.139 Å) 37, 40. The Sn1–O3 distances range from 2.060(2) Å in 6 l to 2.131(4) Å in 6 f , as would be expected for TBP compounds possessing di‐ n ‐butyl and diphenyl substituents (2.096 Å) 37, 40, 42, 43, 47, 50–52. The C α ‐Sn‐C α bond angles are between 118.68° for 6 b and 129.4° for 6 d , compared to the reported literature value of 126.99°,37, 42, 43, 47, 50–52 and the values calculated on the basis of NMR coupling constants for n ‐butyl substituents (135°, Table 5).…”

Preference of di-n-butyltinIV compounds to build O⋯Sn bonds in fused rings with five-six members

“…for the three molecules in 4d, 2.213(2) Å for 4e, these values are longer than those reported in the literature for di-n-butyltin IV (2.180 Å ) compounds (in dichloride tin derivatives the N-Sn distance is shorter, 2.166(8) Å because the tin atom is more acidic)[16,24]. The Sn(2)-O(1) bond distances are 2.082(4) Å for 4a, 2.165(2) Å for compound 4b, 2.146(4), 2.151(4) and 2.082(5) Å for the three molecules in 4d, 2.150(2) Å for 4e, showing values similar to carboxylic compounds previously reported (2.139 Å ) [7,8,16,24].…”

“…Sn (2) than the distances found in TBP tin compounds (2.096 Å ) [7,8,16,24]. The bond angles between both alpha carbons and the tin atom (7) 1.421 (7) 1.438 (7) 1.431(4) C(8)-C(9)…”

“…The use of tridentate ligands which have oxygen, nitrogen and sulfur as donor atoms promotes formation of X ! Sn (X = N, O, S) bonds with a Sn 2 X 2 core (X = S, O) that lead to dimeric molecules with five-five and six-six fused rings [23][24][25][26] (Scheme 1).…”