Highly Volatile Magnesium Complexes with the Aminodiboranate Anion, a New Chelating Borohydride. Synthesis and Characterization of Mg(H₃BNMe₂BH₃)₂ and Related Compounds

Remarkably volatile magnesium complexes have been prepared with the modified borohydride ligand N,N-dimethylaminodiboranate, H3BNMe2BH3−. The homoleptic complex Mg(H3BNMe2BH3)2, its monoadducts with tetrahydrofuran and 1,2-dimethoxyethane, and the mixed ligand complex (C5Me5)Mg(H3BNMe2BH3)(thf) have been prepared. The homoleptic complex Mg(H3BNMe2BH3)2 has a vapor pressure of 800 mTorr at 25 °C, which makes it the most volatile magnesium complex known. Crystal structures and NMR data are reported for all complexes. The compounds are potentially useful as chemical vapor deposition precursors to MgB2 and MgO, and as hydrogen storage materials

Highly Volatile Magnesium Complexes with the Aminodiboranate Anion, a New Chelating Borohydride. Synthesis and Characterization of Mg(H₃BNMe₂BH₃)₂ and Related Compounds

Remarkably volatile magnesium complexes have been prepared with the modified borohydride ligand N,N-dimethylaminodiboranate, H3BNMe2BH3−. The homoleptic complex Mg(H3BNMe2BH3)2, its monoadducts with tetrahydrofuran and 1,2-dimethoxyethane, and the mixed ligand complex (C5Me5)Mg(H3BNMe2BH3)(thf) have been prepared. The homoleptic complex Mg(H3BNMe2BH3)2 has a vapor pressure of 800 mTorr at 25 °C, which makes it the most volatile magnesium complex known. Crystal structures and NMR data are reported for all complexes. The compounds are potentially useful as chemical vapor deposition precursors to MgB2 and MgO, and as hydrogen storage materials

Highly Volatile Magnesium Complexes with the Aminodiboranate Anion, a New Chelating Borohydride. Synthesis and Characterization of Mg(H₃BNMe₂BH₃)₂ and Related Compounds

Remarkably volatile magnesium complexes have been prepared with the modified borohydride ligand N,N-dimethylaminodiboranate, H3BNMe2BH3−. The homoleptic complex Mg(H3BNMe2BH3)2, its monoadducts with tetrahydrofuran and 1,2-dimethoxyethane, and the mixed ligand complex (C5Me5)Mg(H3BNMe2BH3)(thf) have been prepared. The homoleptic complex Mg(H3BNMe2BH3)2 has a vapor pressure of 800 mTorr at 25 °C, which makes it the most volatile magnesium complex known. Crystal structures and NMR data are reported for all complexes. The compounds are potentially useful as chemical vapor deposition precursors to MgB2 and MgO, and as hydrogen storage materials

Synthesis and Characterization of the Octahydrotriborate Complexes Cp*V(B₃H₈)₂ and Cp*Cr(B₃H₈)₂ and the Unusual Cobaltaborane Cluster Cp*₂Co₂(B₆H₁₄)

The new compounds Cp*V(B3H8)2, Cp*Cr(B3H8)2, and Cp*2Co2(B6H14) have been synthesized by treating the pentamethylcyclopentadienyl complexes [Cp*VCl2]3, [Cp*CrCl2]2, and [Cp*CoCl]2 with NaB3H8. X-ray crystallography shows that Cp*V(B3H8)2 and Cp*Cr(B3H8)2 have the same ligand sets but different molecular structures:  the vanadium compound contains two bidentate B3H8 ligands (i.e., bound to the metal center via two vicinal hydrogen atoms), whereas the chromium compound has one bidentate B3H8 ligand and one B3H8 ligand bound in an unprecedented fashion via two geminal hydrogen atoms. The “gem-bound” B3H8 group itself has an atypical structure consisting of a BH2−BH2−BH3 triangle with one additional hydrogen atom bridging the unique BH2−BH2 edge. The B−B distances are nearly identical within experimental error at 1.790(5), 1.792(5), and 1.786(6) Å. The relationship between the electronic and molecular structures of the V and Cr compounds is briefly discussed. The structure of Cp*2Co2(B6H14) can be viewed in two different ways:  as a dicobalt complex in which two Cp*Co units are each bound to four adjacent boron atoms of an S-shaped B6H14 ligand, or as an eight-vertex hypho cluster compound. In the former case, the B6H14 ligand is best regarded as a dianionic bi-borallyl group H3B(μ−H)BH(μ−H)BHBH(μ−H)BH(μ−H)BH3 in which one hydrogen at each end of the chain is involved in an agostic interaction. From a cluster point of view, the structure of Cp*2Co2(B6H14) can be generated by removing three adjacent high-connectivity vertices from the eleven-vertex closo polyhedron. The Co−B distances vary from 2.008(5) to 2.183(4) Å, and the B−B distances within in the S-shaped chain range from 1.734(8) to 1.889(6) Å. Finally, a new synthesis of the known molybdenum compound Cp*2Mo2(B5H9) is described; its structure as established by X-ray crystallography closely resembles that of the previously described (C5H4Me) analogue

Highly Volatile Magnesium Complexes with the Aminodiboranate Anion, a New Chelating Borohydride. Synthesis and Characterization of Mg(H₃BNMe₂BH₃)₂ and Related Compounds

Remarkably volatile magnesium complexes have been prepared with the modified borohydride ligand N,N-dimethylaminodiboranate, H3BNMe2BH3−. The homoleptic complex Mg(H3BNMe2BH3)2, its monoadducts with tetrahydrofuran and 1,2-dimethoxyethane, and the mixed ligand complex (C5Me5)Mg(H3BNMe2BH3)(thf) have been prepared. The homoleptic complex Mg(H3BNMe2BH3)2 has a vapor pressure of 800 mTorr at 25 °C, which makes it the most volatile magnesium complex known. Crystal structures and NMR data are reported for all complexes. The compounds are potentially useful as chemical vapor deposition precursors to MgB2 and MgO, and as hydrogen storage materials

Highly Volatile Magnesium Complexes with the Aminodiboranate Anion, a New Chelating Borohydride. Synthesis and Characterization of Mg(H₃BNMe₂BH₃)₂ and Related Compounds

Remarkably volatile magnesium complexes have been prepared with the modified borohydride ligand N,N-dimethylaminodiboranate, H3BNMe2BH3−. The homoleptic complex Mg(H3BNMe2BH3)2, its monoadducts with tetrahydrofuran and 1,2-dimethoxyethane, and the mixed ligand complex (C5Me5)Mg(H3BNMe2BH3)(thf) have been prepared. The homoleptic complex Mg(H3BNMe2BH3)2 has a vapor pressure of 800 mTorr at 25 °C, which makes it the most volatile magnesium complex known. Crystal structures and NMR data are reported for all complexes. The compounds are potentially useful as chemical vapor deposition precursors to MgB2 and MgO, and as hydrogen storage materials

Selective Localization of Nanofiller on Mechanical Properties of Poly(lactic acid)/Poly(butylene adipate-<i>co</i>-terephthalate) Nanocomposites via the Surface Energy and Melt Blending Technique

The dispersion and localization of nanofillers at the interface in immiscible polymer blends to prevent phase separation and voids are the most important factors for fabricating nanocomposites with outstanding mechanical properties. However, these factors are limited to conventional industrial applications, such as melt blending and extrusion due to the aggregation/agglomeration of the nanofillers during processing. Here, the effects of the melt blending technique and nanofiller surface energy on dispersion and selective localization of the nanofillers in poly­(lactic acid) (PLA)/poly­(butylene adipate-co-terephthalate) (PBAT) nanocomposite were studied. Consequently, we confirmed that the localization of modified silica (m-SiO2) in the nanocomposite could be determined by controlling the PBAT mixing time. Furthermore, the m-SiO2, located at the PLA/PBAT interface with modified cellulose nanofiber, improved the morphology of the PLA/PBAT nanocomposites, thereby significantly improving the tensile strength and elongation at break by approximately 7% and 16%, respectively. The results of this study demonstrate a novel approach to control the dispersion and localization of nanofillers in immiscible polymer blends, thereby paving a new possibility to fabricate eco-friendly packaging materials industrially

Baseline clinical characteristics between the E-Cohort and the L-Cohort.

Baseline clinical characteristics between the E-Cohort and the L-Cohort.</p

Kaplan-Meier analysis of overall survival between the E-Cohort and L-Cohort.

Kaplan-Meier analysis of overall survival between the E-Cohort and L-Cohort.</p

Kaplan-Meier analysis of overall survival between the E-Cohort and L-Cohort among patients with HBV-related HCC.

Kaplan-Meier analysis of overall survival between the E-Cohort and L-Cohort among patients with HBV-related HCC.</p