Crystal and molecular structures of complexes of trimethyltin halides with hexamethyltriamido phosphate

Crystal and molecular structures of some six‐coordinate tin(IV) halogeno complexes with phosphorus‐containing ligands

“…The structure is a slightly distorted octahedron around the tin atom, with bond angles between trans pairs of ligands of 172.96 (5) • , 168.951 (13) • , and 169.908 (12) • . The Br Sn, Sn O, and O P bond distances when compared with literature data for six-coordinate Sn(IV) complexes [18,[29][30][31][32] are in keeping with the expected ranges. There are comparatively few reports for As(III) bonded to Sn(IV) in six-coordinate species (Sn As bond lengths: 2.716 (2) [18]), and the present result is again within this range of values.…”

“…The only previous literature report of a species with the X 5 SnOP − structure (X Cl, Br, or I) is from our work, in the centrosymmetric dianion [Cl 5 SnOP(Ph 2 )CH CHP(Ph 2 )OSnCl 5 ], which has a P O bond length of 1.507(4)Å, the Sn O distance is 2.131(4)Å, and Sn Cl values lie between 2.385(2) and 2.434(2)Å [3]. There have also been several structural determinations for complexes of the type X 4 Sn(OP· · ·PO) (a chelating diphosphane dioxide), or X 4 Sn(OP-) 2 , with both cis and trans isomers known for some unidentate phosphane monoxides [22][23][24][25][26][27][28][29][30][31][32]. Representative distances for chloro compounds [3,[22][23][24][25][26] make it abundantly clear that the values for compounds 2 and 3 are within the normal ranges, apart from the P O bond in 3, which is very slightly longer than is usual.…”

Tris(dialkylamino)phosphine Chalcogenide Complexes of Tin(IV) Chloride: A Multinuclear (31P,77Se, and119Sn) NMR Characterization

“…Due to difficulties in obtaining crystals suitable for X-ray analysis for 1 and 3 and on the basis of the good agreement between experimental X-ray analysis 10 Table 3. The potential energy difference between the two isomers is 0.57 for 1 and 0.67 for 3 against 2.80 kcal mol −1 for the HMPA complex.…”

“…1 For instance, tin tetrachloride (SnCl 4 ) is a strong Lewis acid forming complexes with a variety of neutral ligands [2][3][4][5][6][7] and bind strongly to phosphoramides to form hexacoordinate, 2:1, cis or trans-complexes, both of which have been characterized in solution and in the solid state. 8,9 For example, the hexamethylphosphoramide (HMPA) complex, SnCl 4 .2HMPA, has been found to exist as a trans-adduct in the solid by Xray diffraction 10 and in solution as a mixture of cis and trans isomers by IR and NMR spectroscopy. 11,12 Many works have been reported on studies with bidentate ligands, especially of the type HN[P(E)R 2 ] 2 (E = O, S, or Se).…”

Geometry of the iminium moiety. IV. Structure of 4,5-dihydro-3,5,5-trimethylpyrazolium aquapentachlorostannate monohydrate

“…Coordination between Sn and organic moieties via 0 atoms gives rise to the following structures, two in the cis positions: (i) SnC14.2OPPh3 (Tursina, Aslanov, Medvedev & Yatsenko, 1985) and (ii) SnC14. (4-p-'BuC6H4CHO)2 (Denmark, Henke & Weber, 1987); and three in the trans positions: (iii) SnC14.2Me2N2PO (Aslanov, Ionov, Attiya, Permin & Petrosyan, 1977), (iv) SnC14.4C6HI~OH, with binding through O atoms of two of the cyclohexanol molecules (Fournet & Theobald, 1981) and (v) SnCI4.2C~IHI202, with binding through the carbonyl O atoms of ethyl cinnamate moieties (Lewis, Oxman & Huffman, 1984). Coordination between Sn and crown ether complexes via HzO gives rise to organic moieties located in the cis positions: (vi) SnCl4.18-crown-6.4H20 (Valle, Cassol & Russo, 1984) and (vii) SnCl4.18-crown-6.4H20.-CHC13 (Cusack, Patel, Smith, Allen & Nowell, 1984); and in the trans positions: (viii) SnC14.15-crown-5.-2H20 (Hough, Nicholson & Vasudevan, 1986 Introduction.…”