The synthesis and X-ray structure analysis of the dianion [Ru18(C)2(CO)42Hg3]2–, the first octadecaruthenium cluster

Bailey, Philip J.; JOHNSON, B. F. G.; Lewis, Jack; McPartlin, Mary; Powell, Harold R.

doi:10.1039/c39890001513

Cited by 20 publications

(6 citation statements)

References 2 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2.806(5) Å). This phenomenon is also observed in the [Os 18 Hg 3 (μ 6 ‐C) 2 (CO) 42 ] 2− 11 and [Ru 18 Hg 3 (μ 6 ‐C) 2 (CO) 42 ] 2− ions 12. All carbonyl groups are terminally bound to the cluster, as suggested by solution IR spectroscopy.…”

Section: Electrochemical Data[a] For Clustersupporting

confidence: 57%

P091: Improving sonographers' awareness of facial clefting

Chudleigh

Cook

Smith

et al. 2003

Ultrasound Obstet Gynecol

View full text Add to dashboard Cite

Objective: To assess the performance of stereoscopic viewing compared to conventional display of 3D Ultrasound (3DUS) data for evaluation of fetal cranial structures. Methods: A series of twenty human fetuses were evaluated using conventional 3DUS scanning systems. 2-5 volumes were acquired of the fetal head. Volume rendered images of the fetal cranium, face and internal structures were displayed interactively using routine scanner and workstation display. Volume data also were displayed using a real-time stereoscopic graphics workstation. Visualization parameters could be interactively optimized for both approaches. Both routine and stereoscopic images were evaluated for clarity of structure visualization (sutures, palate, teeth, orbits, etc.), interactivity and ability to identify key anatomic landmarks. Results: Fetal cranial structures were readily identified using both standard viewing and stereoscopic viewing strategies. Fetal cranial structures were more clearly visualized using volume rendered stereoscopic display than standard volume rendered displays. Inclusion of planar slice review further assisted in identification of structures. Stereoscopic display improved conspicuity of complex cranial structures. Conclusions: Stereoscopic display of volume rendered 3DUS data adds valuable information that assists identification of fetal cranial structures, such as sutures and palate. The increasing availability of stereoscopic visualization workstations will offer an additional tool to fetal diagnosis and evaluation. Conclusion:The guidelines have produced a positive impact on sonographer awareness of facial clefting. They are altering clinical practise particularly in imaging the alveolar ridge. P091Improving sonographers' awareness of facial clefting

show abstract

Section: Electrochemical Data[a] For Clustersupporting

confidence: 57%

P091: Improving sonographers' awareness of facial clefting

Chudleigh

Cook

Smith

et al. 2003

Ultrasound Obstet Gynecol

View full text Add to dashboard Cite

show abstract

“…The Hg7Hg distances are 2.763, 2.764 and 2.802 # A, which are comparable with the analogous distances in the triangular groups observed in terlinguaite, 44 kuznetsovite 60 and Hg 9 As 4 O 16 . 62 In the [(Ph 3 P) 111 It should be noted that the Hg7Hg distances are virtually equal to the corresponding distances in metallic mercury. 69 In the solid state, the [Ru 18 Hg 3 (C) 2 (CO) 42 ] 27 dianion has the symmetry C 3 .…”

Section: Mercury-containing Transition Metal Clustersmentioning

confidence: 97%

Crystal chemistry of compounds containing mercury in low oxidation states

Pervukhina¹,

Магарилл²,

Борисов³

et al. 1999

Russ. Chem. Rev.

View full text Add to dashboard Cite

We demonstrated the precise measurement of a 20-V programmable Josephson voltage standard (PJVS) system with an accuracy of 10 À9 . A 20-V PJVS chip including 524288 NbN/TiN x /NbN Josephson junctions (JJs) was used and operated in a cryocooler. By optimizing a microwave frequency, the widest current margin of a voltage step greater than 1 mA was obtained at 15.85 GHz. The maximum voltage of 17 V was also obtained at 18.00 GHz although we could not obtain voltages exceeding 20 V due to defective JJs. We also successfully compared the PJVS system with a 10-V Zener diode with an accuracy of 10 À8 . #

show abstract

“…[6] The OsÀOs bonds in the two layers either side of Pd 3 subcluster are elongated (2.958(3) ä) when compared to the remaining OsÀOs bonds (av. [12] All carbonyl groups are terminally bound to the cluster, as suggested by solution IR spectroscopy. This phenomenon is also observed in the [Os 18 Hg 3 (m 6 -C) 2 (CO) 42 ] 2À [11] and [Ru 18 Hg 3 -(m 6 -C) 2 (CO) 42 ] 2À ions.…”

mentioning

confidence: 95%

[{N(PPh₃)₂}₂{Os₁₈Pd₃(μ₆‐C)₂(CO)₄₂}]: An Osmium–Palladium Mixed‐Metal High‐Nuclearity Carbonyl Cluster

Yung

Wong

2003

Angew Chem Int Ed

View full text Add to dashboard Cite

Dedicated to Professor The Lord Lewis on the occasion of his 75th birthdayHigh-nuclearity mixed-metal clusters have aroused considerable attention because of their ability to act as an ™electron reservoir∫, the potential to precisely control the ratio and geometry of the two metals involved, [1] and their potential application in catalysis.[2] Reactions of cluster anions with palladium±halide complexes were found to be effective in producing high-nuclearity mixed-metal clusters, for example, [Fe 6 Pd 6 (CO) 24 H] 3À , [3] [Ru 10 Pd 8 C 2 (CO) 27 (C 3 H 5 ) 4 ], [4] and [Ni 9 Pd 33 (PPh 3 ) 6 (CO) 41 ]À .[5]However, high-nuclearity osmium±palladium mixed-metal clusters prepared by a similar approach are rare.[6] We recently established a reliable route to preparing such species in moderate yield using a decaosmium cluster anion and a palladium cation as the starting materials. Herein, we report the synthesis and structural characterization of the novel high-nuclearity sandwich osmium±palladium mixed-metal cluster [{N(PPh 3 ) 2 } 2 {Os 18 Pd 3 -(m 6 -C) 2 (CO) 42 þ salt (1) in 37 % yield. An insoluble black solid was also obtained from the reaction mixture; IR spectroscopy indicated that the solid material may consist of highnuclearity carbonyl±metal clusters.Single crystals of 1 suitable for X-ray analysis were obtained as dark-green blocks by slow evaporation of the CH 2 Cl 2 /MeOH solution mixture at 0 8C. The molecular structure, together with some important bond parameters, is depicted in Figure 1. The structure of 1 can be described as a giant dumbbell-shaped bimetallic nanocluster. The cluster core-geometry can be divided into three metallic domains. A triangular Pd 3 metal unit is sandwiched between two tricapped octahedral {Os 9 (m 6 -C)(CO) 21 } subclusters, which combine to give an overall D 3h symmetry. The five ABABA closepacked layers of metal ions (6:3:3:3:6) that are shown in Figure 2 are unprecedented in existing Os±Pd mixed-metal clusters. The central {Os 3 Pd 3 Os 3 } unit, which consists of the Os7, Os8, Os9, Pd1, Pd2, Pd3, Os10, Os11, and Os12 metal ions, forms a face-sharing bioctahedron that is reminiscent of the Rh 9 geometry observed in the [Rh 9 (CO) 19 ] 3À ion.[9] The palladium ions, which form the edge-sharing face of the bioctahedron only possess metal±metal bonding character; there are no bonds to carbonyl ligands, which is very unusual. This naked metal triangle is relatively exposed, which may facilitate the coordination of nucleophiles. For the two osmium domains, two Os 9 units are in an eclipsed conformation, which is contrary to the closely related osmium±mercury mixed-metal cluster, [{N(PPh 3 ) 2 } 2 {Os 18 Hg 3 (m 6 -C) 2 (CO) 42 }].

show abstract

The synthesis and X-ray structure analysis of the dianion [Ru₁₈(C)₂(CO)₄₂Hg₃]^2–, the first octadecaruthenium cluster

Cited by 20 publications

References 2 publications

P091: Improving sonographers' awareness of facial clefting

P091: Improving sonographers' awareness of facial clefting

Crystal chemistry of compounds containing mercury in low oxidation states

[{N(PPh₃)₂}₂{Os₁₈Pd₃(μ₆‐C)₂(CO)₄₂}]: An Osmium–Palladium Mixed‐Metal High‐Nuclearity Carbonyl Cluster

Contact Info

Product

Resources

About

The synthesis and X-ray structure analysis of the dianion [Ru18(C)2(CO)42Hg3]2–, the first octadecaruthenium cluster

Cited by 20 publications

References 2 publications

P091: Improving sonographers' awareness of facial clefting

P091: Improving sonographers' awareness of facial clefting

Crystal chemistry of compounds containing mercury in low oxidation states

[{N(PPh3)2}2{Os18Pd3(μ6‐C)2(CO)42}]: An Osmium–Palladium Mixed‐Metal High‐Nuclearity Carbonyl Cluster

Contact Info

Product

Resources

About

The synthesis and X-ray structure analysis of the dianion [Ru₁₈(C)₂(CO)₄₂Hg₃]^2–, the first octadecaruthenium cluster

[{N(PPh₃)₂}₂{Os₁₈Pd₃(μ₆‐C)₂(CO)₄₂}]: An Osmium–Palladium Mixed‐Metal High‐Nuclearity Carbonyl Cluster