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)

Abstract

The crystal and molecular structures of the acaricides chlorotrineophylstannane (ta), chlorotris[( dimethylphenylsilyl)methyl]stannane (tb ), and trineophyl(1,2,4-triazol-1-yl)stannane hemihydrate (2a · 0.5H 2 0), have been determined by single-crystal X-ray diffraction studies. The structure of 2,5-dimethyl-2,5-diphenylhexane (4) was also investigated for comparison.

Spontaneous vs. Base‐Induced Dehydrochlorination of Group 14 ortho‐Carboranylamidinates

“…[15] and H 2 L′. [18] In 1-6, the E-C-(carborane) separations are comparable with those in other group 14 organyl compounds, [24][25][26][27][28][29][30] while the E-N separations are considerably larger than those observed for classical covalent E-N bonds. [26,30,31] Within the amidine fragment, the C3-N1 separation is 126-131 pm, while the C3-N2 bond is slightly longer, at 132-137 pm.…”

“…In 8 and 9, both the Si-C and the Si-N distances are in the typical range of covalently bonded silicon. [24,27,29,32,33] The geometric parameters around the Si atom and within the carboranylamidinate ligand are virtually equal to those in the previously reported compound Ph 2 Si[L′]. [18] The molecular structure of Cl 2 Si[L] (7) is very similar, even though the crystal quality was not good enough for a complete structural refinement.…”

Tin Organometallic Compounds: Classification and Analysis of Crystallographic and Structural Data: Part 1. Monomeric Derivatives

“…The most common form of distortion isomerism [22] is where two or more crystallographically independent molecules are found within the same crystal. Tin follows this trend with two such molecules [2,11,19,31,50,67,75,80,82,84,88,93,95,100,110,117,123,124,140, 142,168,175,176,187,189,191,197,212,213,218,21,225,245,253,258,270,280,298,303,304, 317,318,320,327,330,346,382,410,428,430,435,441,463,471,478,480,481,501,504,511,535,544,5 46,554,582,626,681,682,686,738,739]; three such molecules [31,168,459]; and four such molecules [160,166,204,316,398], While the mean Sn(ll)-C bond distances increases with an increase in coordination number, this is not the case for Sn(IV)-C bond distances. For example, for tin(ll) the values are 221 pm (two coordinate) and 228.5 pm (for three coordinate (Tables 1 and 2).…”

“…These differ mostly by degree of distortion. Several derivatives contain two crystallographically independent molecules in the same crystal [50,67,75,79,80,82,84,88,93,95,100,110,117,123,124,140,142,168,175,176,187,189,191,197,212,213,218,221,225,245,253,258,270,289,298], In another two derivatives [31,168] three independent molecules are found, and three examples with four such molecules [160,166,204] in rH in rH 00 in CS rH CS CO CO CO CO rH rH CS CO rH CO rH CS <o rH rH -rH CS CS rH CO rH ΙΟ CS …”

Novel Tin-Containing Crown Ether Substituted Ferrocenophanes as Redox-Active Hosts for the Ditopic Complexation of Lithium Chloride

“…The last two distances 2.739(2) Å (Sn(1)–O(1); 3 , molecule B) and 2.624(3) Å (Sn(1)–O(1); 4 ) are the longest in comparison with the intramolecularly coordinated chloridotriorganotin- and fluoridotriorganotin-substituted crown ethers Ph 2 ClSn-CH 2 -[16]-crown-5 (2.571(1) Å), Ph 2 ClSn-CH 2 -[19]-crown-6 (2.606(2) Å), and Ph 2 FSn-CH 2 -[16]-crown-5 (2.5301(18) Å) . As expected, the Sn(1)–Cl(1) and Sn(2)–Cl(2) distances of 2.4394(10) and 2.4383(11) Å in compound 3 and the Sn(1)–F(1) distance of 2.031(2) Å in compound 4 are longer than the corresponding distances in tetracoordinated triorganotin chlorides such as [PhC(CH 3 ) 2 CH 2 ] 3 SnCl (Sn(1)–Cl(1) = 2.395(4) Å) and triorganotin fluorides such as Mes 3 SnF (Sn(1)–F(1) = 1.961(4) Å) and (PhMe 2 Si) 3 CSnMe 2 F (Sn(1)–F(1) = 1.965(2) Å) . They exceed the sum of the covalent radii of tin and chlorine by 0.049 and 0.048 Å, respectively, but are close to that of tin and fluorine (2.04 Å), respectively.…”