Poly[octa-carbonyl-heptakis-(tetra-hydro-furan)-diironmanganesedisodium(2 -)].

The reaction of NaFe(CO) with an excess of MnCl in tetra-hydro-furan (THF) produced {FeMn(CHO)Na(CHO)(CO)] or CHFeMnNaO. The compound is a xenophilic dianion with short iron-manganese bond lengths of 2.6274 (10) and 2.

Bioactive hydroperoxyl cembranoids from the Red Sea soft coral Sarcophyton glaucum.

A chemical investigation of an ethyl acetate extract of the Red Sea soft coral Sarcophyton glaucum has led to the isolation of two peroxide diterpenes, 11(S) hydroperoxylsarcoph-12(20)-ene (1), and 12(S)-hydroperoxylsarcoph-10-ene (2), as well as 8-epi-sarcophinone (3). In addition to these three new compounds, two known structures were identified including: ent-sarcophine (4) and sarcophine (5). Structures were elucidated by spectroscopic analysis, with the relative configuration of 1 and 2 confirmed by X-ray diffraction.

Remote exo/endo selectivity in selective monohydrolysis of dialkyl bicyclo[2.2.1]heptane-2,3-dicarboxylate derivatives.

High exo-facial selectivity was observed in the selective monohydrolysis of a series of near-symmetric diesters that possess an exo-ester group and an endo-ester group attached on a norbornane or norbornene skeleton. The selectivities were found to be clear-cut, although the reaction center in these reactions is one covalent bond distant from the norbornane or norbornene ring, where the difference of the environment between the exo face and endo face is therefore expected to be negligible. The effect of the co-solvent we studied earlier for the selective monohydrolysis reaction was also confirmed and contributed to improvement of the yields of the half-esters.

Calixarenes Derivatized with Sulfur-Containing Functionalities as Selective Extractants for Heavy and Precious Metal Ions.

The calix[4]arenes 5,11,17,23-tert-butyl-25,26,27,28-(2-methylthioethoxy)calix[4]arene, 25,26,27,28-(2-methylthioethoxy)calix[4]arene, and 5,11,17,23-tert-butyl-25,26,27,28-(2-(2-thiophenecarboxy)ethoxy)calix[4]arene have been prepared. The structure of 25,26,27,28-(2-methylthioethoxy)calix[4]arene has been verified by X-ray crystallography. The crystals with the empirical formula C(40)H(48)O(4)S(4) are monoclinic C2/c with a = 20.

Crystal Structure, Physical Properties, and Hydrolysis Kinetics of [(O)(tmpa)V(IV)(&mgr;-O)V(V)(tmpa)(O)](3+).

We report the synthesis, crystal structure, physical properties and hydrolysis kinetics of [(O)(tmpa)V(IV)(&mgr;-O)V(V)(tmpa)(O)](3+) (tmpa = tris(2-pyridylmethyl)amine), the first cation in its class for which both solid state and solution-phase characteristics are fully consistent with expectations for a Robin-Day type III mixed-valence complex. [V(2)(tmpa)(2)(O)(3)](ClO(4))(3).CH(3)CN crystallizes in the triclinic, P&onemacr; (No.

Terminal Coordination of a Gallium(I) Species to a Transition Metal. Syntheses and Crystal Structures of Ru{GaCl(THF)(2)}{GaCl(2)(THF)}(2)(CO)(3).0.5THF and Ru(2){GaCl(2)(THF)}(2)(CO)(8).

The reaction of Ru(3)(CO)(12) with Ga(2)Cl(4) in the presence of gallium metal in refluxing toluene, followed by crystallization from tetrahydrofuran, produces Ru{GaCl(THF)(2)}{GaCl(2)(THF)}(2)(CO)(3).0.5 THF (1) and Ru(2){GaCl(2)(THF)}(2)(CO)(8) (2) (THF = tetrahydrofuran).