trans-Mo(CO)4[Ph2P(CH2CH2O)3CH2CH2PPh2-P,P'] | 357397-00-3

• 英文名称: trans-Mo(CO)4[Ph2P(CH2CH2O)3CH2CH2PPh2-P,P']
• CAS: 357397-00-3
• 化学式: C₃₆H₃₆MoO₇P₂
• 分子量: 738.565
• InChiKey: XQVMZKAAHSANJL-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  cis-Mo(CO)4[Ph₂P(CH₂CH₂O)3CH₂CH₂PPh₂-P,P'] 以 四氢呋喃 为溶剂， 以24%的产率得到trans-Mo(CO)4[Ph2P(CH2CH2O)3CH2CH2PPh2-P,P']
  参考文献：
  名称：

  Metallacrown ethers with trans-tetracarbonylmolybdenum(0) centers. X-ray crystal structures of trans-Mo(CO)4{Ph2P(CH2CH2O)nCH2CH2PPh2-P,P′} (n=3, 5) and trans-Mo(CO)4{Ph2P(CH2CH2O)2-1-C6H4-2-(OCH2CH2)2PPh2-P,P′}

  摘要：

  Photolysis of the cis-Mo(CO)(4){Ph2P(CH2CH2O)(n)CH2CH2PPh2-P,P'}, (1, n = 3; 2, b = 4; 3, n = 5) metallacrown ethers in tetrahydrofuran under nitrogen gives moderate yields of the corresponding trans-Mo(CO)(4){Ph2P(CH2CH2O)(n)CH2CH2PPh2-P,P'} (4, n = 3; 5, n = 4; 6, n = 5) metallacrown ethers. The trans-metallacrown ethers are also obtained when catalytic amounts of HgCl2 are added to chloroform solutions of the cis-metallacrown ethers. The 1 reversible arrow 4 and 2 reversible arrow 5 equilibria are established within 3 min at ambient temperature and approximately equal amounts of the cis- and trans-metallacrown ethers are present in the equilibrium mixtures. The 3 reversible arrow 6 equilibrium is more complicated because HgCl2 complexation by 3 also occurs in these solutions. Addition of excess HgCl2 to the equilibrium mixture of 3 and 6 results in the formation of the previously reported cis-Mo(CO)(4){mu -Ph2P(CH2CH2O)(5)CH2CH2PPh2-,P',O,O',O " ,O''',O''''}HgCl2. Comparison of the X-ray crystal structures of the trans-metallacrown ethers 4-6 and trans-Mo(CO)(4){Ph2P(CH2CH2O)(2)-1-C6H4-2-(OCH2CH2)(2)PPh2-P,P'} (7) indicates that both ring size and flexibility affect the conformations of the metallacrown ether rings. The larger oxygen-oxygen distances in the trans-metallacrown ethers, compared with those in the corresponding cis-metallacrown ethers 1, 3 and cis-Mo(CO)(4){Ph2P(CH2CH2O)(2)-1-C6H4-2-(OCH2CH2)(2)PPh2-P,P'} (8), may explain why the trans-metallacrown ethers have not been observed to bind strongly the hard metal cations. (C) 2001 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0020-1693(01)00350-4