Trisubstituted Heteropolytungstates as Soluble Metal-Oxide Analogs. Isolation and Characterization of [(C5Me5)Rh.cntdot.P2W15Nb3O62]7- and [(C6H6)Ru.cntdot.P2W15Nb3O62]7-, Including the First Crystal Structure of a Dawson-Type Polyoxoanion-Supported Organometallic Complex

1995 ◽  
Vol 34 (4) ◽  
pp. 767-777 ◽  
Author(s):  
Matthias Pohl ◽  
Yin Lin ◽  
Timothy J. R. Weakley ◽  
Kenji Nomiya ◽  
Masahiko Kaneko ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Metal Oxide ◽  
Organometallic Complex ◽  
Isolation And Characterization

Serendipitous isolation of a triazinone-based air stable organic radical: synthesis, crystal structure, and computation

2020 ◽  
Vol 44 (26) ◽  
pp. 10781-10785
Author(s):  
Vedichi Madhu ◽  
Arun Kumar Kanakati ◽  
Samar K. Das
Keyword(s):  
Crystal Structure ◽  
Radical Cation ◽  
Organic Radical ◽  
Radical Cation Salt ◽  
Isolation And Characterization

Here we report the synthesis, isolation, and characterization of a dication salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one {12+(PF6)22−·2H2O1(PF6)2·2H2O}, and its radical cation salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one (1+˙PF6−1˙PF6).

Isolation and characterization of the pyridazine (pydz) bridged halogenotrimethylplatinum(IV) complexes [PtXMe3)2(μ-pydz)] (X = Cl, Br, I). X-ray crystal structure of [(PtIMe3)2(μ-pydz)]

Polyhedron ◽  
1994 ◽  
Vol 13 (17) ◽  
pp. 2501-2505 ◽  
Author(s):  
Edward W. Abel ◽  
Peter J. Heard ◽  
Keith G. Orrell ◽  
Michael B. Hursthouse ◽  
K.M. Abdul Malik
Keyword(s):  
Crystal Structure ◽  
X Ray ◽  
Isolation And Characterization

Isolation and characterization of the prokaryotic proteasome homolog HslVU (ClpQY) from Thermotoga maritima and the crystal structure of HslV

2002 ◽  
Vol 100 (1-3) ◽  
pp. 437-452 ◽  
Author(s):  
Hyun Kyu Song ◽  
Matthias Bochtler ◽  
M.Kamran Azim ◽  
Claudia Hartmann ◽  
Robert Huber ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermotoga Maritima ◽  
Isolation And Characterization

Isolation and characterization of an unusually stable formamidinium-containing macrotricyclic complex of lithium ion formed during the synthesis of 14-thia-1,4,8,11-tetraaza-bicyclo[9,5,3]nonadecane

2007 ◽  
Vol 85 (7-8) ◽  
pp. 506-512 ◽  
Author(s):  
Tosha M Barclay ◽  
Alexander McAuley ◽  
S Subramanian
Keyword(s):  
Crystal Structure ◽  
Complex Cation ◽  
Lithium Ion ◽  
Transition Metal Ions ◽  
Lithium Cation ◽  
Isolation And Characterization ◽  
Prolonged Contact ◽  
Efficient Route ◽  
The Common

Using 1,3-bis(chloroacetamido)propane (5) as the common intermediate, an efficient route is described to the stepwise syntheses of 1-thia-4,8-diazacyclodecane, [10]aneN2S (8), and the pentadentate macrobicycle 17-thia-1,4,8,11-tetraazabicyclo[9,5,3]-nonadecane (11). During the investigation of the condensation of (5) with (8), with Li2CO3 used as a base the Li+ cation is carried over as the complex of the dioxo intermediate (10) and survives further reduction. Prolonged contact of these complexes with CHCl3 during cyclisation and extraction (in the presence of Li2CO3 and NaOH, respectively), leads to the formation of the complex cation [Li(4)]2+ as a byproduct in which the cationic macrocycle (4), containing a formamidinium ring, is formed through bridging of the 1,11-nitrogens in the macrobicycle (11) by a -CH= group that is derived from CHCl3. This renders the cavity in (4) too small for the inclusion of transition metal ions. Reaction of the lithium cation [Li(4)]2+ with PdCl2 yielded the trimetallic salt [(Li(4)]-PdCl2-[(Li(4)])](ClO4)4 in which two [Li(4)]2+ ions are bridged by a PdCl2 unit through coordination of the pendant thioether donors. A crystal structure of this trimetallic salt confirms the formation of [Li(4)]2+. In contrast, if triethylamine is used as a base during the cyclisation reaction leading to the formation of (11) and contact with aqueous NaOH and CHCl3 during its isolation is minimized, the formation of (4) is prevented and the yield of (11) improved.Key words: macrobicycle synthesis, lithium, formamidinium, paaladium, complex.

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