摘要
用单晶 X 射线衍射技术测定了三苄基锡5-叔丁基呋喃甲酸酯(1)和三丁基锡5-叔丁基呋喃甲酸酯(2)的分子和晶体结构、1为三斜晶系 PI,晶胞参数 a=1.1253(2),b=1.3138(3),c=1.3920(2)nm,α=89.39(1),β=89.22(1),γ=71.50(2)°,Z=4;2为单斜晶系 P2_1/n,晶胞参数α=1.4732(2),b=1.0266(3),c=1.6385(3)nm,β=101.45(1)°,Z=4.两个化合物中 Sn 原子均分别与5-叔丁基呋喃甲酸的羰基氧配位形成五配位三角双锥构型的线型聚合物.2的 Sn—O 键长为0.2440(2),0.2171(6)nm;与之不同的是1有四种不同的 Sn—O 键,其键长分别为0.2462(6),0.2186(5),0.2389(5)和0.2204(5)nm,Sn(1)和 Sn(2)周围的苄基和呋喃酰基的平面夹角相差很大,是一类由两个中心锡原子组成一个结构单元的五配位线型聚合的有机锡化合物.
The crystal and molecular structures of tribenzyltin 5-tertbutyl furoate (1) andtributyltin 5-tertbutyl furoate (2) have been determined by three dimensional X-raymethod.The crystal 1 crystallizes in trimetric,space group P1 with a=1.1253(2),b=1.3138(3),c=1.8920(2)nm,Z=4,and 2 in monoclinic,space group P2_1/n with a=1.4732(2),b=1.0266(3),c=1.6385(3)nm,Z=4.In crystal 1,the tin atom renderedfive-coordinate in a trigonal bipyramidal structure by bridging carboxyl group andthe resulting structure is linear polymer containing two different tin atom with fourdifferent Sn—O bond lengths of 0.2462(6),0.2186(5),0.2389(5),0.2204(5)nm and twodihedral angles of 86.48,88.01°between planes of benzyl and 2-furoyl groups.Incrystal 2,the tin atom rendered five-coordinate in a trigonal bipyramidal structurewith two different Sn—O bond lengths of 0.2171(6),0.2440(2)nm and larger dihedralangle (89.88°).
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1991年第11期1085-1093,共9页
Acta Chimica Sinica
