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Citation: Huang Chunhui, Xu Rongfang, Zhou Yongfeng, Xu Guangxian, Guo Fang, Zhu Naijue. STUDIES ON NEUTRAL PHOSPHINE EXTRACTED COMPLEXES OF RARE EARTHS Ⅲ. SYNTHESIS AND CRYSTAL STRUCTURE OF TRINITRATOTRI (TRIPHENYL-PHOSPHINE OXIDE) LANTHANUM[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB19870510 shu

STUDIES ON NEUTRAL PHOSPHINE EXTRACTED COMPLEXES OF RARE EARTHS Ⅲ. SYNTHESIS AND CRYSTAL STRUCTURE OF TRINITRATOTRI (TRIPHENYL-PHOSPHINE OXIDE) LANTHANUM

1.
Chemistry Department; Peking University; Institute of Chemistry Academia Sinica; Beijing

Received Date: 8 May 1986
Available Online: 15 October 1987

The Synthesis, character and crystal structure of La(NO_3)_3·3Ph_3PO·C_2H_5OH· CHCl_3 has been presented in this paper. Crystal and molecular structure has been determined by single-crystal X-ray diffraction techniques with a four circle diffrac- tometer. The crystal is monoclinic with space group P2_1/n. The unit cell parameters are:
a=1.3111(5) nm Z=4
b=2.5075(10) nm F(000)=2687.65
c=1.8725(6) nm μ(MoKa)=9.83 cm~(-1)
β=98.53(3)° d_(cal.)=1.45 gcm~(-3)
V=6.088 nm d_(lab.)=1.43 gcm~(-3)
8022 independent diffaraction data has been collected, of which 3362 observable independent reflections were used for structure refinement to a final R value of 0.08. The lanthanum atom is coordinated by nine oxygen atoms, of which six from three bidentate nitrate groups and the others from from three Ph_3PO each. The average bond length of La—O is 0.2549 nm.
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