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Category Chemical encyclopedia  

TALLIYORGANICHESKIE CONNECTIONS


2017-12-28 00:00:00

TALLIYORGANICHESKIE CONNECTIONS , contain a link Tl-C. Naib. characterized by Comm. TlIII, DOS. types: R 3 T1, R 2 TlX and RTlX 2 R = Alk, Ar; X = Hal, OR` etc ..

The compounds of the type R 3 Tl-kristallich. Islands in R = CH 3 , Ar or R-boiling liquid loweralkyl insoluble org. district-solvent, with heat. and in the light decomposing are. Trimetiltally-dimensional Unit. R 3 T1 react with metals and metalloorg. Comm., for example. 2R 3 T1 + 3Hg : 3R 2 Hg + 2T1. Under the influence of the electrophile. reagent water-you to, halogens, metal halides, and others. One is easily cleaved org. radical-alkylated Ariely ruyut aldehydes and carboxylic acid chlorides to form a T-resp. alcohols and ketones. In the p-pax R 3 T1 is rapid exchange of groups R, resulting in mixtures of R 3 T1 and R 3 T1 formed R 2 R`T1 and RR 2 T1.

Describes p-tsii introduction of SO n n = 2,3 or carbene: CCl 2 in the compound. R 3 T1 to form R 2 TlO n SR or R 2 T1CC1 2 R.

Basic. synthesis method-interaction. RLi or RMgX with R 2 TlX; CH 3 3 Tl obtained by p-tion: 2CH 3 Li + CH 3 I + TlI : : CH 3 3 Tl + 2LiI. Used as the p-symmetrization of oxidative and decarboxylation of p-or-desul fonilirovaniya eg .:

3R 2 TlBr + 2Cu : 2R 3 Tl + TlBr + 2CuBr

R 2 TlOCOR : R 3 Tl + CO 2

The compounds of the type R 2 TlX-resistant s altlike Comm., in polar media ionized, in the p-tures associated. Have a lower response. capacity than R 3 Tl and RTlX 2 , so Naib. accessible and understood. Enter the district of relations Tl-C and Tl-X. The first group consists of the district: disconnection Tl-C chemical. or electrochemical. by eg. Pb 2 TlVr + Hg : Ph 2 Hg + TlBr; alkilnyh exchange groups, for example. CH 3 2 TlH + C 2 H 5 2 TlH 4098-14.jpg 2CH 3 C 2 H 5 TlH; p-tion with electrophiles, eg. R 2 TlOAc + HgOAc 2 : : RTlOAc 2 + RHgOAc. The second group consists of the district: with alcohols and thiols R 2 T1X + R`YH : R 2 T1YR` + HX X = OH, OR : , SR : , NRS, Y = O, S; anion exchange R 2 TlC1 + KI : R 2 T1I + KC1; implementation heterocumulene CO molecules 2 , COS, for example. CH 3 2 TlNR 2 + CO 2 : < font face = "MediaFontW5">: CH 3 2 TlOCONR 2 .

Methods of synthesis: interaction. T1Sl 3 with metalloorg. Comm. T1C1 3 + 2RMgX : R 2 T1X + 2MgXCl for R 2 T1C1 use R 2 Hg; Comm., in to-ryh R = Ar or vinyl, prepared by the district of 2RBOH 2 + TlH 3 + H 2 O : R 2 TlX + + 2VON 3 + 2NH; The same method was used to synthesize Comm. with mixed radicals, eg. 4-CH 3 C 6 H 4 MIND 2 + + RhTlSl 2 + H 2 O : Rh4-CH 3 C 6 H 4 TlSl BOH + 3 + HCl.

The compounds of type RTlX 2 -vysokoplavkie solid in the islands, non-electrolytes. Their structure is not certain. Describes the 4-and 5-coordination. complexed with electron donors. Comm. highly reactive, break Communications Tl-C under the action of reducing agents or electrophiles; ArTlH 2 in the p re easily turned. in Ar 2 and TlH TlH 3 . Synthesized by the action of electrophiles to Alk 2 TlH or interaction. TlSl 3 with arylboronic to Tami.

Connections TlI. Described tsiklopentadieniltally C 5 H 5 T1, analogs and borinaty C 5 H 5 BRTl. C 5 H 5 Tl-IAS abutment to O 2 and moisture in the air, moderately sol. Polar org. p-evaporated. In the solid-linear chain

Conn. C 5 H 5 BRT1 R = CH 3 , Ph get p-tion T1C1 borinatami with alkali metals.

From talliyorganicheskih compounds find use as a polymerization catalyst difeniltalliybromid unsaturated conn., C 5 H 5 Tl as a donor cyclopentadienyl ligand.

Lit .: Methods of Organoelement Chemistry. Bor,

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