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Phosphorus-germanium bonds reactions with

The reaction of phosphine (produced in situ from magnesium phosphide and hydrogen chloride in dioxan solution) with 1,5-diketones gives106 the phosphorina-none derivatives (104). Carbonyl compounds and heterocumulenes (e.g. CO2, CS2) insert into the germanium-phosphorus bond of germaphospholans to form derivatives of the germaphosphepin system [e.g. (105)].106>107... [Pg.18]

Proof that a double bond is present is best illustrated by the reactions of a germanium phosphorus compound, an orange crystalline solid. If treated with HCl, HOH, or CH3OH, the compound undergoes an addition reaction similar to alkenes, and its orange color is discharged as it forms a saturated colorless product ... [Pg.208]

Carbon dioxide can also form carbamates by reaction with amides of non-metallic elements [78-84, 136-144]. Most examples reported in the literature deal with amides of silicon, germanium, and phosphorus. Among these, the insertion of the heterocumulene into the P-N bond of hexaalkylphosphorus triamides P(NR2)3, which affords phosphocarbamates species of formula P(NR2)3 (02CNR2) t, has received particular attention for its potential in chemical synthesis, because this reaction opens a route to the phosgeneless synthesis of carbamate esters [138,139] and ureas [140]. [Pg.112]

There are a few isolated cases of the addition of amines, thiols, carboxylic acids, and a phosphorus ylide to doubly bonded germanium compounds. Again, the reactions are regioselective, with the nucleophilic portion of the weak acid adding to the germanium and the proton adding to the heteroatom. [Pg.292]

The resistance of the E14-S bond in cyclotrimetallathianes toward nucleophilic reagents, for example, water and alcohol,62 increases on going from the silicon compounds to the corresponding germanium and tin derivatives. This is due, most likely, to the fact that the reaction of less nucleophilic ylides with phenyl groups at the phosphorus atom with trithianes (R2MS)3 (M = Ge, Sn) occurs slowly and is impeded by several side processes. [Pg.46]

The chemical reactions of nitrogen and phosphorus are similar because they share the same number of electrons in their outer shell (five). The reactivity of oxygen resembles the reactivity of sulfur because of their shared outer-shell occupancy (six). This outer-shell occupancy of an atom is called its valence. Carbon has a valence of four (with four electrons in its outer shell), and its chemistry shares some similarities with silicon, which also has a valence of four. Silicon, germanium, tin, and lead, which have the same valence, have all been used in various proportions to form semiconductors, interesting and important materials that we will investigate later when we discuss chemical bonding. [Pg.63]


See other pages where Phosphorus-germanium bonds reactions with is mentioned: [Pg.736]    [Pg.298]    [Pg.38]    [Pg.118]    [Pg.572]    [Pg.5]    [Pg.309]    [Pg.1316]    [Pg.126]    [Pg.248]    [Pg.10]    [Pg.6]    [Pg.26]    [Pg.727]    [Pg.67]    [Pg.9]    [Pg.226]    [Pg.247]    [Pg.28]    [Pg.27]    [Pg.27]   


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