Synthesis, characterisation and molecular structure of stannyl derivatives of molybdenum and iron

Synthesis of Half‐Sandwich Tungsten Chlorogermyl and Chlorostannyl Complexes

“…8 shows the typical piano‐stool arrangement as expected for a half‐sandwich compound. The geometrical features of 8 in the solid state are very similar to that found for the Mo analogue [(η 5 ‐C 5 H 5 )(OC) 3 Mo(SnCl 3 )]:6 the tetrahedral coordination geometry of the tin atom is strongly distorted and resemble a trigonal pyramid also found for the Mo compound. All Cl–Sn–Cl angles are acute (mean: 98.27°) whereas the Cl–Sn–W angles are more obtuse showing values between 116.14(3) (Cl2–Sn1–W1) and 121.81(3)° (Cl1–Sn1–W1).…”

“…The detected 1 H NMR chemical shift at 5.77 for the Cp is in accordance with literature ( δ = 5.6 ppm) as well as the IR data 16. The 119 Sn NMR resonance was detected at δ = –89.4 ppm, which is about 115 ppm shifted to higher field in comparison to the Mo analogue [(η 5 ‐C 5 H 5 )(OC) 3 Mo(SnCl 3 )] ( δ = 26 ppm) 6. Due to the fact that only IR data of 7 are published16 (except for 1 H NMR of 8 ,16b), we characterized 7 and 8 by 1 H, 13 C and 119 Sn NMR as well as elemental and melting point analysis.…”

“…Despite this fact, the amount of complexes owing a chlorogermyl or chlorostannyl moiety, which allow further functionalization and reaction chemistry, is fairly limited – in particular in the case of germanium, and only little work has been carried out concerning investigations of the Cl–Sn unit of a transition metal. One of them – the most recent work – deals with chloride displacement by nucleophilic sulfur or oxygen groups with the latter (pyridinedicarboxylic acid) leading to an iron complex with fivefold‐coordinated tin6 (Figure 1). Another investigation topic is the Lewis basicity of the Cl 3 Sn group.…”

Self-assembly syntheses and crystal structures of triorganotin(IV) pyridinecarboxylate: 1D polymers and a 42-membered macrocycle

“…Self-assembly of organotin (IV) pyridinecarboxylates are attracting more and more attention because the ligand with multi-coordination may lead to different specific architectures [1][2][3][4][5][6][7][8][9]. Recently, considerable advances have been made in this area, mono-, dicarboxylic acids and substituted carboxylic acids have been extensively investigated.…”