Fluoropolyether group containing compound

A fluoropolyether group-containing compound of the following formula (1) or (2):

• RF1—X—RSi (1)
• RSi—X—RF2—X—RSi (2)
• wherein
• RF1 is Rf1—RF—Oq—;
• RF2 is —Rf2p—RF—Oq—;
• Rf1 is a C1-16 alkyl group optionally substituted with one or more fluorine atoms;
• Rf2 is a C1-6 alkylene group optionally substituted with one or more fluorine atoms;
• RF is each independently at each occurrence a group represented by formula:
• —(OC6F12)a—(OC5F10)b—(OC4F8)c—(OC3RFa6)d—(OC2F4)e—(OCF2)f—;
• a, b, c, d, e, and f are each independently an integer of 0 to 200, the sum of a, b, c, d, e, and f is one or more, and the occurrence order of the respective repeating units enclosed in parentheses provided with a, b, c, d, e, or f is not limited in the formula;
• RFa is each independently at each occurrence a hydrogen atom, a fluorine atom, or a chlorine atom;
• p is 0 or 1;
• q is independently 0 or 1;
• X is a group represented by the following formula:
• RX1 is each independently at each occurrence a C1-6 alkylene group;
• RX2 is each independently at each occurrence a C1-6 alkylene group optionally substituted with a C1-6 alkyl group or cyclic alkyl group optionally containing one or more nitrogen atoms, oxygen atoms, sulfur atoms, or silicon atoms, or with a perfluoroalkyl group;
• Ry is each independently at each occurrence a hydrogen atom, a C1-6 alkyl group, or a phenyl group;
• X11 is each independently at each occurrence a single bond, an oxygen atom, or a divalent organic group;
• RSi is each independently at each occurrence represented by the following formula (S1):
• —CRd1k2Re1l2Rf1m2 (S1);
• Rd1 is each independently at each occurrence —Z2—CR31p2R32q2R33r2;
• Z2 is each independently at each occurrence a single bond, an oxygen atom, or a divalent organic group;
• R31 is each independently at each occurrence —Z2′—CR32′q2′R33′r2′;
• Z2′ is each independently at each occurrence a single bond, an oxygen atom, or a divalent organic group;
• R32′ is each independently at each occurrence —Z3—SiR34n2R353-n2;
• R33′ is each independently at each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group;
• q2′ is each independently at each occurrence an integer of 0 to 3;
• r2′ is each independently at each occurrence an integer of 0 to 3;
• Z3 is each independently at each occurrence a single bond, an oxygen atom, or a divalent organic group;
• R34 is each independently at each occurrence a hydroxyl group or a hydrolyzable group;
• R35 is each independently at each occurrence a hydrogen atom or a monovalent organic group;
• n2 is each independently at each occurrence an integer of 1 to 3;
• R32 is each independently at each occurrence —Z3—SiR34n2R353-n2;
• R33 is each independently at each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group;
• p2 is each independently at each occurrence an integer of 0 to 3;
• q2 is each independently at each occurrence an integer of 0 to 3;
• r2 is each independently at each occurrence an integer of 0 to 3;
• Re1 is each independently at each occurrence —Z3—SiR34n2R353-n2;
• Rf1 is each independently at each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group;
• k2 is each independently at each occurrence an integer of 0 to 2;
• l2 is each independently at each occurrence an integer of 1 to 3;
• and
• m2 is each independently at each occurrence an integer of 0 to 2.