squarate造句

• The same method yields iron ( II ) squarate dihydroxide Fe 2 ( OH ) 2 ( C 4 O 4 ) ( light brown ).
• Cobalt ( II ) squarate dihydroxide Co 3 ( OH ) 2 ( C 4 O 4 ) 2 3H 2 O ( brown ) is obtained together with the previous compound.
• Cyclobutanetetrone can be viewed as the neutral counterpart of the squarate anion C 4 O 4 2 & minus;, which is stable and has been known at least since 1959.
• The conjugate base of squaric acid is the hydrogensquarate anion C 4 HO 4  "; and the conjugate base of the hydrogensquarate anion is the divalent squarate anion C 4 O 4 2 ".
• One or both of the oxygen ( = O ) groups in the squarate anion can be replaced by other chalcogenides such as sulfur or other divalent groups, such as dicyanomethylene = C ( CN ) 2.
• The resulting anions, such as 1, 2-bis ( dicyanomethylene ) squarate and 1, 3-bis ( dicyanomethylene ) squarate, retain the aromatic character of squarate and have been called pseudo-oxocarbon anions.
• The resulting anions, such as 1, 2-bis ( dicyanomethylene ) squarate and 1, 3-bis ( dicyanomethylene ) squarate, retain the aromatic character of squarate and have been called pseudo-oxocarbon anions.
• The resulting anions, such as 1, 2-bis ( dicyanomethylene ) squarate and 1, 3-bis ( dicyanomethylene ) squarate, retain the aromatic character of squarate and have been called pseudo-oxocarbon anions.
• There have been theoretical investigations of the analogous compound obtained by substituting amino groups (-NH 2 ) for the hydroxyl ( OH ) groups to yield 1, 2-diamino-3-cyclobutenedione, and of a compound consisting of two squarate rings bridged by (-NH-) bonds to form bis ( 3-cyclobutene-1, 2-dione ) piperazine.