Jin Xianglin

The study on single crystal structure of [Zn(Hpdc) 2 (H 2 O) 2 ]·2H 2 O (Hpdc − =2,5-pyridinedicarboxylic acid group)

Abstract The hydrothermal synthesis and structure of a coordination polymer Zn(Hpdc)2(H2O)2]·2H2O were reported. The Zn2+ center was coordinated by two waters and two chelated Hpdc− to form units [Zn(Hpdc)2 (H2O)2] and the units were connected by hydrogen bonds to engender one-dimensional channels through the c axis. Especially, the two lattice waters play an important role in construction of these channels.

Synthesis and crystal structure of isomerized butadiene(dicarbonyl)(ethoxyarylcarbene)iron complexes

Reaction of π-butadienetricarbonyliron(I) with aryllithium ArLi (Ar = phenyl, substituted phenyl, 1-naphthyl and 2-thienyl) in ether at low temperature, followed by the alkylation of the acylmetallate obtained with triethyloxonium tretrafluoroborate [(C2H5)3OBF4] in water solution at 0°C 10 orange-red crystalline complexes with the composition C4H6(CO)2FeC(OC2H5)Ar. On the basis of elemental analyses, IR, 1H NMR and mass spectra, as well as single crystal X-ray structure determination, it is corroborated that these new compounds were isomers of butadienyldicarbonyl(ethoxyarylcarbene)iron complexes with two types of structure. A possible reaction mechanism is tentatively proposed and discussed in this paper.

Structural investigation of the organolanthanide di-η5-cyclopentadienyl 1,1,1-trifluoroacetylacetonato ytterbium

Abstract The crystal structure of Cp 2 Yb·(CH 3 COCHCOCF 3 ) has been determined by single-crystal X-ray diffraction. The ytterbium atom is η 5 -coordinated to two cyclopentadienyl ligands and chelated with the two oxygen atoms of the 1,1,1-trifluoroacetylacetonato ligand. A structural comparison of this complex with Cp 2 Yb(CH 3 COCHCOCH 3 ) is given.

Synthesis, crystal structure and reaction of differentially ring-substituted titanocene dichlorides

SummaryA new class of differentially ring-substituted titanocene dichlorides of the type Cp′Cp″TiCl2 has been prepared by reacting Cp″M (M=Li, K; Cp″=RC5H4) with Cp′TiCl3 (Cp′=MeOCH2CH2C5H4). The crystal structure of Cp′(PhCEt2C5H4)TiCl2, the first example, has been determined by x-ray diffraction and refined to a final R factor of 0.0532 for 2304 reflections. The crystal belongs to the monoclinic space group C2h5−P21/c with unit cell parameters:a 10.205(6),b 13.003(5),c 17.591(9) Å, β 101.91(4)°, V=2284 Å3, Z=4 and Dc=1.32 g/cm−3. Replacement of one neomenthyl in bis(neomenthyl-cyclopentadienyl)titanium dichloride by one MeOCH2CH2 — raises the e.e. value from 5.8% to 11.2% in the catalytic asymmetric hydrogenation of 2-phenyl-1-butene.