Low valent
Stabilization of low-valent group 14 element
... of low-valent germanium complexes, 8,9 multiple bonds, and some of these studies have yielded compounds that have no precedent in carbon chemistry ...
180
Homoleptic Low-Valent Polyazides of Group 14 Elements
... The first low-valent homoleptic azido complexes of group 14 have been synthesized and fully characterised. The preparative approach to salt-like compounds containing these complexes has been demonstrated on ...
5
Investigations on Low-Valent Group 8 and 9 Metalloradicals
... Low-valent metalloradicals of the late 2nd and 3rd row transition metals are reactive species that generally cannot be isolated and require in situ characterization. 1 To date, these S = ½ species have ...
284
Building New Low Valent Phosphorus Molecules by P+ Transfer
... Figure 1.1 Salt metathesis reactions involving a phosphorus trihalide and various oragnolithium reagents to demonstrate the change in oxidation states of the phosphorus center determined by traditional counting rules. ...
224
Low valent carbonylvanadium complexes of the triphosphorus macrocycle 12[ane]P3Et3
... The presence of alternative ligands which can π -bond e ffi - ciently with the metal may in fl uence the extent to which the unpaired electron interacts with the P nuclei. In these com- plexes, the proposed structure ...
5
Synthetic and Mechanistic Studies of Small-Molecule Activation at Low-Valent Iron, Cobalt, and Iridium Centers
... However, late transition metals such as the ones shown to form carbenes by multiple C– H activations are well known to form coordinatively unsaturated complexes, the most prevalent of which is the square‐planar, d 8 ...
256
Labile low-valent tin azides: syntheses, structural characterization, and thermal properties.
... Manipulations involving compounds known (or suspected) to be air and/or moisture sensitive were performed using standard Schlenk, vacuum line, and glovebox techniques under an atmosphere of dry argon. The typical ...
33
Labile low-valent tin azides: syntheses, structural characterization, and thermal properties.
... which have well-established synthetic procedures. 1-4 Exceptions to this notion exist in particular among the binary azides of lighter, more electronegative elements, such as those in Group 14 (E = Si - Sn, n = 2 or 4). ...
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Structural and reductive chemistry of low valent lanthanide complexes featuring modified porphyrinogens
... The molecular structure of both complexes contain single lanthanide metal centres bound in alternate 1-1 I 11 5 :11 I fashion with Ti I -binding to the anionic pyrrolide nitrogens and 11[r] ...
239
Catalytic studies of low valent palladium \(N\) heterocyclic carbene complexes
... Thus, these complexes were used for further investigations as precatalysts/catalysts in relation to Heck coupling, the related Suzuki and Sonogashira C-C cross-coupling reactions, as wel[r] ...
136
The Addition of Alkynes to Low-Valent Silicon Compounds: A Mechanistic Study
... Scheme 3.9: Addition of phenylacetylene to silylene 3.15 and the proposed zwitterionic intermediate.... 77.[r] ...
127
Two Examples of Oxidation and Reduction: Epoxidation Catalysis with Manganese Porphyrins and Reductive Coupling of Carbonyls enabled by Cr(CO)6
... This simple method provides an attractive alternative to accomplish low valent metal induced reductive coupling reactions such as the McMurry reaction. Compared to traditional McMurry reaction or other ...
232
2,2′ [1,2 Bis(4 chlorophenyl)ethane 1,2 diyl]bis(1 tetralone)
... that low-valent titanium can abstract oxygen from ketones or aldehydes leading to formation of ...by low-valent titanium reagents has been observed and a large number of functional groups can ...
13
Synthesis, Spectral Study and Theoretical Treatment of Some Mixing Ligand Complexes of Quinaldic Acid and 1, 10-Phenathroline Sahar Sabeeh Hassan | Sura Khaleel Ibrahim | Moiead Salih Mohammed
... usually acts as a bidentate chelating ligand in its some metal (II) complexes [7]. Mixed ligand complexes of QA and pyridine derivatives metabolites formed are important signaling agents in neuronal pathways which are ...
11
Overview of pneumococcal serotypes and genotypes causing diseases in patients with chronic obstructive pulmonary disease in a Spanish hospital between 2013 and 2016
... of S. pneumoniae from a normally sterile site plus clinical symptoms of infection. Non-bacteremic pneumococcal pneumonia (non-BPP) was defined as the isolation of S. pneumoniae from a good-quality sputum sample (< 10 ...
14
Human Papillomavirus Vaccine Effectiveness and Herd Protection in Young Women
... A limitation of this study was the small proportion of women who received the 9-valent vaccine in wave 4, which limited our ability to examine the trends in HPV prevalence due to the effects of the 9-valent ...
13
Understanding how ESOL Pre Services Teachers' Prior Experiences and Background Shape their Processes of becoming L2 (Reading) Teachers
... An important factor to assess during pre-licensure is the detail evaluation of vaccine safety. For PCV7 and PCV13 no major safety problems were identified, however it is impossible to identify all safety concerns during ...
49
Rationale and methods of a randomized controlled trial of immunogenicity, safety and impact on carriage of pneumococcal conjugate and polysaccharide vaccines in infants in Papua New Guinea
... as low birth weight was used as a surrogate marker for prematurity, which may affect immune responses to vaccines including PCVs [62], as well as that prematurity is hard to assess in this ...
15
Role of pneumococcal vaccination in prevention of pneumococcal disease among adults in Singapore
... Centers for Disease Control and Prevention analyzed data from the 2010 National Health Interview Survey to assess adult vaccination rates and found them to be low for most routinely recommended vaccines. Only ...
13
Recurrent severe invasive pneumococcal disease in an adult with previously unknown hyposplenia
... Table 2 Recommended immunizations against invasive pneumococcal disease using the 13-valent pneumococcal conjugate vaccine PCV13 and the 23-valent pneumococcal polysaccharide vaccine PPV[r] ...
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