Crystal structure of dichloro(diphenyl)tin

Abstract

The crystal and molecular structure of dichloro(dipheny1)tin has been determined by single-crystal X-ray diffraction methods using the intensities of about 3800 reflections measured by counter diffractometry. The crystals belong to the triclinic system, a = 15.905(2), b = 9.367(1), c = 9.034(1) A, 0: = 76.89(1), p = 93.21 (1). y = 94.78(1)", space group P i , and Z = 4. The structure was solved by Patterson and Fourier methods and refined by blockdiagonal least-squares techniques, using individual anisotropic thermal parameters, to R 0.040. All hydrogen atom positions were located but were not refined.There are two discrete molecules of Ph,SnCI, in the asymmetric unit with identical geometry. The mean bond distances are: Sn-CI 2.346(2), Sn-C 2-1 14(3), and C-C 1.387(13) A. Mean values for the valence angles at the tin atom are : CI-Sn-CI 100, CI-Sn-C 107, and C-Sn-C, 125.5".There is no molecular association in the crystal, the shortest Sn . . . CI contact being 3.77 A. The interpretation of Mossbauer spectroscopic results in terms of a polymeric network in the crystal structure involving six-co-ordinate tin is thus shown to be incorrect.WE are studying the nature of the Sn-Fe bond in certain organomet allic complexes, and have carried out X-ray diffraction studies on the series of compounds (x-C,H5)Fe(CO),SnPh,C13-.n (n = 0-3) and the analogous tribromo-compound.5 Since there is no apparent restriction on the mutual orientation of the two parts of the molecule about the metal-metal bond we concluded that d,,+, contributions to that linkage were unimportant and that the bond was predominantly of o-character. However, it is less obvious that there should be any necessary steric restriction in the case of d,,-d, bonding between the metal atoms, though a definite stereochemical arrangement is certainly required for 6-bonding.6 In seeking to test for the possible presence of d,,--d, contributions to the metal-metal bond we noted that replacement of a phenyl group by chlorine in the series of compounds examined gave rise to a regular change in the valence angles at the tin atom. Similar changes are observed in the molecular geometry of compounds of the type [(x-C,H,)Fe(CO),],-SnRZ77* and we have observed that replacement of a phenyl group in the first series by an iron moiety gives a compound of the second type with very similar geometry at the tin atom. Since carbon has no available d-orbitals this apparent equivalence of the two groups seems good evidence that it is not necessary to invoke d,,-d, bonding in order to account for the observed

Synthesis, crystal structures and spectroscopic properties of dichloroethylphenyltin(IV) and its phenanthroline adduct

“…18 Ph 2 SnCl 2 , though described as a discrete molecule, 19 is similar to Ph(Me)SnCl 2 , but with weaker bridges. In Ph(Et)SnCl 2 , Cl(2) is not involved in any weak intermolecular interaction, whereas Cl(1) interacts with two different tin atoms, Sn i (i = 2 − x, −y, 1 − z) and Sn ii (ii = x, 0.5 − y, −0.5 + z).…”

Moleku¨lstruktur der Akarizide Chlortrineophylstannan, Chlortris[(dimethylphenylsilyl)methyl]stannan und Trineophyl(1, 2, 4-triazol-1-yl)stannan-hemihydrat sowie des 2, 5-Dimethyl-2, 5-diphenylhexans (Bineophyl)

“…Bei Ph 2 SnC1 2 ist der C-Sn-C-Winkel dagegen sogar auf 125.5 ° aufgeweitet, was darauf hindeutet, dass neben Sterischen auch elektronische Effekte eine starke Verzerrung der Bindungswinkel am tetrakoordinierten Zinn bewirken können [9].…”

Methyl Tin(IV) Derivatives of HOTeF5 and HN(SO2CF3)2: A Solution Multi-NMR Study and X-ray Crystal Structures of (CH3)2SnC1(OTeF5) and (CH3)3Sn(H2O)2N(SO2CF3)2

“…9976 (5) 794 (2) 892 (3) 95(1)-F (43) 8150 (5) 1537 (2) 1581 (2) 91(1) F (51) 7822 (4) 4885 (2) -30(2) 71(1) F (52) 9275 (5) 5742 (2) 944 (2) 83(1) F (53) 6284 (4) 5708 (2) 735 (2) 84 (1) 0(1) 4717 (4) 2953 (3) 4793 (2) 46 (1) 0(2) 3362 (4) 4046 (3) 2154 (2) (41) 108 (3) 70 (2) 91 (2) 31(2) -4(2) 21(2) F (42) 107 (3) 39 (2) 145(3) -15 (2) 36 (2) 9(2) F (43) 90 (2) 60 (2) 138 (3) 26 (2) 66(2) -3(2) F (51) 87 (2) 79(2) -52 (2) 25 (1) 25 …”