Bis[tris(tetrahydrofuran)lithium(1+)] bis(μ-diphenylphosphanido)bis(tetra-carbonylmolybdate)(2–)

In the dianion [Mo2(/z-PPh2)2(CO)8] 2-, two Mo centres are 4.100 (1)/ apart and are bridged asymmetrically by two diphenylphosphanido ligands. Each metal atom is also coordinated by four terminal CO ligands. There are strong interactions between the dianion and the two [Li(thf)3] + cations (thf = C4HsO). The Li ions are ligated by one equatorial carbonyl O atom from each Mo centre.published_or_final_versio

Triruthenium alkylidyne cluster complexes [H2Ru3(CO)9(μ3-CX)] (X=pyridine, 4-ethylpyridine)

Crystal structure analyses of nonacarbonyl-1K3C, - 2K3 C,3 K3 C-di-#-hydrido - l :2x2 H;2:3 K'-H-# 3-(pyrid-1- ylmethylidyne)-triangulo-triruthenium, [Ru3(#-H)2- (#3-C6HsN)(CO)9], (I), and nonacarbonyl-lK3C,- 2 K3C,3 K3C-# 3-[(4-ethylpyrid- 1 -yl)met hylidyne]-di- #-hydrido- l :2K2 H;2:3 x2 H-triangulo-triruthenium, [Ru3(#-H)2(#3-CsHgN)(CO)9], (II), reveal that both compounds consist of a triruthenium alkylidyne core with the nucleophiles [pyridine in (I) and 4-ethylpyridine in (II)] bonded to the #3-bridging alkylidyne C atom.published_or_final_versio

Sodium trans-Dicyano[N,N'-1,2-phenylenebis(2-pyridinecarboxamido)]cobaltate(III)

The Co atom in the [ColII(CN)2(CI8HI2N402)] - complex anion is hexacoordinate with a distorted octahedral geometry. The four N atoms in the amide ligand occupy equatorial positions and are coplanar to within 0.007A. The two CN groups are coordinated to Co in a trans configuration. The Na cation interacts with four complex anions through their cyanide-N and amide-O atoms, thereby adopting a distorted tetrahedral coordination.published_or_final_versio

trans-Diehlorotetrapyridineruthenium(II)

[Ru(py)4Cl2] (where py = pyridine, CsHsN), crystallizes in the tetragonal space group I4/acd. Ru and C1 atoms occupy sites of 222 and 2 point symmetry, respectively. The Ru atom has slightly distorted octahedral coordination. The C1--Ru---C1 moiety is linear, as a result of symmetry requirements.published_or_final_versio

2-Hydroxy-3-(p-nitrobenzenesulfonylamino)propylammonium p-nitrobenzenesulfonate

The title compound, [NO2C6H4SO2NHCH2CHOHCH2NH3]+- [p-NO2C6H4SO3]ÿ or C9H14N3O5S+ C6H4NO5Sÿ, was isolated from the reaction between 1,3-diamino-2-hydroxypropane and p-nitrobenzenesulfonyl chloride in CH2Cl2. The fairly extensive hydrogen-bond system involving all `active' H atoms links the ions in the crystal into layers normal to the b axis.published_or_final_versio

Feasibility of 50-nm device manufacture by 157-nm optical lithography: an initial assessment

The normalized process latitude (NPL) is used to assess the feasibility of 50-nm device manufacture by 157-nm optical lithography. A first NPL quantification assuming steady improvement of processing technology shows that 157-nm optical lithography is infeasible. A second NPL quantification investigates the amount of technology acceleration required to make 50-nm manufacture possible. It is concluded that photolithography is a viable lithography technique for the 50-nm technology generation only with significant improvements in focus control, photomask making, photoresist contrast, as well as aberration levels.published_or_final_versio