Di-<i>tert</i>-butyl(glycylglycinato)tin(IV) monohydrate

Preut, H.; Mundus, B.; Huber, F.; Barbieri, Riccardo

doi:10.1107/s0108270188013320

Cited by 19 publications

(10 citation statements)

References 2 publications

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“…E120,14 the polyhedron around the tin atom is a distorted trigonal bipyramid formed by the two organic groups and the tridentate dipeptide ligand, the latter having on the whole a planar skeleton (see Figs 1 and 2, Table 3, and Refs 1, 8,11,13,14). The dihedral angle formed by the two chelate rings of the SnGlyVal skeleton (planes 2 and 3, Table 3) has a value of 10.5".…”

Section: The Molecular Structure Of Nbusnglyvalmentioning

confidence: 98%

Synthesis and spectroscopic characterization of dimethyl‐, di‐n‐butyl‐, di‐t‐butyl‐and diphenyl‐tin(iv) derivatives of dipeptides: Crystal and molecular structure of di‐n‐butyltin(iv) glycylvalinate

Mundus-Glowacki

Huber

Preut

et al. 1992

Applied Organom Chemis

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The dipeptide complexes R2SnL listed below have been synthesized: (a) Me2SnL; H2L = glycylalanine (H2GlyAla), glycylvaline (H2GlyVal), glycylmethionine (H2GlyMet), glycyltryptophan (H2GlyTrp), glycyltyrosine (H2GlyTyr); (b) nBu2SnL; H2L = H2GlyAla, H2GlyVal; (c) nBu2SnL.H2O; H2L = glycylglycine (H2GlyGly), H2GlyAla; (d) tBu2SnL; H2L = H2GlyAla, H2GlyVal; (e) tBu2SnGlyGly. H2O; (f) Ph2SnL; H2L = H2GlyAla, H2GlyVal, H2GlyTyr, H2GlyTrp; (g) Ph2Sn(HGlyVal)2. The crystal and molecular structures of nBu2SnGl Val have been determined by single‐crystal X‐ray diffraction. The polyhedron around tin is a distorted trigonal bipyramid, analogous to that of Et2SnGlyTyr (see Vornefeld et al., Appl. Organomet. Chem., 1992, 6: 75). According to infrared and 119Sn (ΔE parameters) Mössbauer spectroscopic data the R2SnL derivatives can be classified by their solid‐state structure into two types which are distinguished by the nature of the axial carboxylate [(i) monodentate, as in nBu2SnGlyVal; (ii) bidentate]. Bonding in R2SnL.H2O and Ph2Sn(HGlyVal)2 has been discussed on the basis of vibrational data. Rationalization of the 119Sn Mössbauer parameters has been attempted by ‘literal’ point‐charge model, calculations of ΔE in the structural context described above. According to 13C NMR spectra, compounds Me2SnL are undissociated in methanol solutions, whilst dissociation is inferred for aqueous solutions, probably concerning the carboxyl and amino groups only. Five‐coordination in methanol and aqueous solutions has been assumed for Me2Snl from 119Sn NMR chemical shifts. Values of coupling constants |2J(119Sn, 1H)|, determined from 1H NMR spectra, gave estimates of CSnC angles in Me2SnL in the range 128–136° in methanol and aqueous solutions, which correspond to values from 119Sn Mössbauer ΔE parameters (129.6–133.8°). The structural relationship of R2SnL molecules in the solid state and in solution phase has been discussed.

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Section: The Molecular Structure Of Nbusnglyvalmentioning

confidence: 98%

Synthesis and spectroscopic characterization of dimethyl‐, di‐n‐butyl‐, di‐t‐butyl‐and diphenyl‐tin(iv) derivatives of dipeptides: Crystal and molecular structure of di‐n‐butyltin(iv) glycylvalinate

Mundus-Glowacki

Huber

Preut

et al. 1992

Applied Organom Chemis

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“…In comparison with diorganotin(IV)-peptide systems [2,9,22,23,28,29,31,35,36], relatively less attention has been paid to the triorganotin(IV)-peptide systems [2,22,27,28,32,34]. The molecular structures of a number of diorganotin(IV) derivatives of dipeptides have also been determined [37][38][39][40][41][42][43][44][45]. Here we report the synthesis and structural studies of some di-and triorganotin(IV) derivatives of H 2 Tyr-Phe and single crystal X-ray structure of Me 2 Sn(TyrPhe) Á MeOH.…”

Section: Introductionmentioning

confidence: 99%

New di- and triorganotin(IV) derivatives of tyrosinylphenylalanine as models for metal–protein interactions: Synthesis and structural characterization. Crystal structure of Me2Sn(Tyr-Phe)·MeOH

Nath

Singh

Eng

et al. 2008

Journal of Organometallic Chemistry

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“…In the context of structure-activity relationships X-ray structure determinations of such compounds have been undertaken. These revealed in each case an essentially identical trigonal bipyramidal polyhedron around the central tin atom (Huber, Haupt, Preut, Barbieri & Lo Giudice, 1977;Preut, Mundus, Huber & Barbieri, 1986, 1989. However, from Mrssbauer and vibrational spectra, solid-state structures with hexacoordinated tin were inferred (Huber, Mundus, Barbieri & Ruisi, 1986) but no single crystals had been obtained to verify this structure.…”

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confidence: 99%