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Borderline hydrides typically refer to hydrides formed of hydrogen and elements of the periodic table in group 11 and group 12 and indium (In) and thallium
Borderline_hydrides
Molecule made of a main-group element bound to hydrogen
Borderline hydrides Hydride Preferred IUPAC name Nomenclature of Inorganic Chemistry IUPAC Recommendations 2005 (Red Book) Par. IR-6 Parent Hydride Names
Parent_hydride
Chemical compound
metal hydride like stannane. It should have properties similar to that of hydrogen selenide and hydrogen telluride, other borderline hydrides. It is
Polonium_hydride
Most are stable to nearly 300 °C and, in contrast to the polysilicon hydrides, are inert to oxygen at normal temperatures. They are not easily hydrolyzed
Polysilane
Chemical reaction in which a nucleophile is affixed to the substrate
nucleophilic substitution. Common examples include: Organic reductions with hydrides, for example R−X → R−H using LiAlH4 (SN2) Hydrolysis reactions such as
Nucleophilic_substitution
Class of enzymes
such as esters and nitriles, are less activated and are considered as "borderline substrates". Another family of flavin-dependent ERs, that is specialized
Ene-reductase
Poisonous and flammable gas
panel can identify the presence of hydrogen sulfide. 10–20 ppm is the borderline concentration for eye irritation. 50–100 ppm leads to eye damage. At 100–150 ppm
Hydrogen_sulfide
Chemical theory about acids and bases
acid/base reactions with a reference base for comparison. Borderline cases are also identified: borderline acids are trimethylborane, sulfur dioxide and ferrous
HSAB_theory
Tabular arrangement of the chemical elements
metals which are reactive solid metals. This and hydrogen's formation of hydrides, in which it gains an electron, brings it close to the properties of the
Periodic_table
Series of 1950s US nuclear tests
and remained useful under the PTBT. Intentional cratering tests are borderline; they occurred under the treaty, were sometimes protested, and generally
Operation_Upshot–Knothole
Star in the constellation Cygnus
ratio in χ Cygni's atmosphere is 0.95, consistent with its status as a borderline S/MS star. χ Cygni is the first Mira star to have a magnetic field detected
Chi_Cygni
Category of metallic elements
predominantly ionic in nature; the heavier alkaline earths have more stable hydrides and less stable carbides. Which elements start to be counted as post-transition
Post-transition_metal
Substellar object
called WZ Sge-type dwarf nova often show donors with a mass near the borderline of low-mass stars and brown dwarfs. The binary BW Sculptoris is such a
Brown_dwarf
Category of chemical elements
are widely recognized as nonmetals. Additionally, some or all of six borderline elements (metalloids) are sometimes counted as nonmetals. The two lightest
Nonmetal
Chemical element with metallic and nonmetallic properties
Since the mid-20th century it has been used to refer to intermediate or borderline chemical elements. The International Union of Pure and Applied Chemistry
Metalloid
Warf Iowa State College Physico-inorganic chemistry of certain metallic hydrides Earth Science Henry Paul Hansen Oregon State College Paleobotanical study
List of Guggenheim Fellowships awarded in 1947
List_of_Guggenheim_Fellowships_awarded_in_1947
BORDERLINE HYDRIDES
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