N-phenyl-pyrazine-2-carboximidic acid amide | 91091-12-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: N-phenyl-pyrazine-2-carboximidic acid amide
• 英文别名: pyrazine-2-carbonimidic acid anilide；Pyrazin-2-carbimidsaeure-anilid；2-(N-Phenyl-guanyl)-pyrazin
• CAS: 91091-12-2
• 化学式: C₁₁H₁₀N₄
• 分子量: 198.227
• InChiKey: YXHHCPUODDAGJK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.91
• 重原子数：
  15.0
• 可旋转键数：
  2.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  61.66
• 氢给体数：
  2.0
• 氢受体数：
  3.0

反应信息

• 作为产物：
  描述：

  吡嗪酰胺 在 三氯化铝 、 三氯氧磷 作用下， 生成 N-phenyl-pyrazine-2-carboximidic acid amide
  参考文献：
  名称：

  GENERAL FORMS FOR MINIMAL SPECTRAL VALUES FOR A CLASS OF QUADRATIC PISOT NUMBERS

  摘要：

  This paper studies the spectrum that results when all height one polynomials are evaluated at a Pisot number. This continues the research theme initiated by Erdos, Joo and Komornik in 1990. Of particular interest is the minimal non-zero value of this spectrum. Formally, this value is denoted as l(1) (q), and this definition is extended to all height m polynomials asl(m)(q) := inf(\y\ : y epsilon(0) + epsilon(1)q(1) +... + epsilon(n)q(n), epsilon(i) is an element of Z, \epsilon(i)\ less than or equal to m, y not equal 0).A recent result in 2000, of Komornik, Loreti and Pedicini gives a complete description of l(m)(q) when q is the Golden ratio. This paper extends this result to include all unit quadratic Pisot numbers. A main theorem is as follows.THEOREM. Let q be a quadratic Pisot number that satisfies a polynomial of the form p(x) = x(2)-ax +/- 1 with conjugate r. Let q have convergents; {C-k/D-k} and let k be the maximal integer such that\D(k)r - C-k\ less than or equal to m 1/1 - \r\;thenl(m)(q) = \D(k)q - C-k\.A value related to l(q) is a(q), the minimal non-zero value when all +/-1 polynomials are evaluated at q. Formally, this isa(q) := inf(\y\ : y = epsilon(0) + epsilon(1)q2 + ...+ epsilon(n)q(n), epsilon(i) = +/-1, y not equal 0).An open question concerning how often a(q) = l(q) is also answered in this paper.

  DOI：

  10.1112/s0024609302001455