Structural and solution studies of diiodine charge-transfer complexes of thioether crowns

Telluranes: potential synthons for charge-transfer complexes (involving hypervalent Te–I bonds) and serendipitous synthesis of the first triphenyl methyl phosphonium salts containing [C4H8TeI4]2− and [TeI6]2−anions

“…The I(1)-I(3)-I(3A) angle is 175.8°. The lengthening of I-I bonds in 1 is comparable to those observed for cyclic thioether-diiodine CT complexes [22] and I-I secondary bond distance 3.39 A A is comparable to 3. 32 A A in Bu t 3 PI 2 , CT complex reported by du Mont et al [23], indicating sufficient interaction in solid state.…”

31P CP-MAS NMR, Vibrational, and X-Ray Characterization of the Adducts of Triphenylphosphine Sulfide with ICl and IBr

“…On the other hand the I±X bond distance is lengthened with respect to the gaseous I±X molecules as a certain amount of donor electronic charge is transferred to the r*-antibonding orbital of the I±X molecule [16]. While for neutral adducts the d(S±I) and d(I±I) bond distances have been represented by Herbstein and Schwotzer [17] and by us [18] to fit a hyperbolic curve, due to the paucity of crystallographic data on neutral adducts with IBr and ICl it is at present impossible to find a similar correlation between d(S±I) and d(I±Br) or d(I±Cl). To overcome this and to check whether similar hyperbole curves are valid also for IBr and ICl adducts, we have considered the net increase in the I±X bond distance Dd(I±X),…”

Structural and theoretical study on the 1:2 addition complex of 1,2,4,5-bis{8′,11′-dithia[4.3.3]propella(3′,4′)}benzene with I2

“…For the major component the I(14)-I(15) bond length of 2.8153(5) is longer than 2.715(6) Å found for the molecule I 2 in solid state [34]. The moiety S(12)Á Á ÁI (14) for I 2 complexes with some thioether compounds [10]. The appropriate values found in the paper of Yamamoto and co-workers [35], not included in [10], are also fitted well into the scatter-plot SÁ Á ÁI versus I-I.…”

“…The moiety S(12)Á Á ÁI (14) for I 2 complexes with some thioether compounds [10]. The appropriate values found in the paper of Yamamoto and co-workers [35], not included in [10], are also fitted well into the scatter-plot SÁ Á ÁI versus I-I. The distance of 3.5957(12) Å between I(15) and S(9) (Àx, y + 1/2, Àz À1/2) suggests lack of I 2 bridging interaction.…”